free-programming-books/books/free-programming-books.md

Index

• ABAP
• Ada
• Agda
• Alef
• Android
• APL
• Arduino
• ASP.NET
• Assembly Language
  • Non-X86
• AutoHotkey
• Autotools
• Awk
• Bash
• Basic
• BETA
• Blazor
• C
• C#
• C++
• Chapel
• Cilk
• Clojure
• COBOL
• CoffeeScript
• ColdFusion
• Component Pascal
• Cool
• Coq
• Crystal
• CUDA
• D
• Dart
• DB2
• DBMS
• Delphi / Pascal
• DTrace
• Eiffel
• Elasticsearch
• Elixir
  • Ecto
  • Phoenix
• Elm
• Emacs
• Embedded Systems
• Erlang
• ESP8266
• F#
• Firefox OS
• Flutter
• Force.com
• Forth
• Fortran
• FreeBSD
• Git
• Go
• Graphical user interfaces
• Graphics Programming
  • Vulkan
• GraphQL
• Groovy
  • Gradle
  • Grails
  • Spock Framework
• Hack
• Hadoop
• Haskell
• Haxe
• HTML / CSS
  • Bootstrap
  • Tailwindcss - Adam Wathan
• HTTP
• HTTPS
• Icon
• Idris
• iOS
• IoT
• Isabelle/HOL
• J
• Java
  • Codename One
  • JasperReports
  • Spring
  • Spring Boot
  • Spring Data
  • Spring Security
  • Wicket
• JavaScript
  • Angular.js
  • Aurelia
  • Backbone.js
  • Booty5.js
  • D3.js
  • Dojo
  • Elm
  • Ember.js
  • Express.js
  • Ionic
  • jQuery
  • meteor
  • Node.js
  • Om
  • React
  • React Native
  • Redux
  • Vue.js
• Jenkins
• Julia
• Kotlin
• Language Agnostic
  • Algorithms & Data Structures
  • Artificial Intelligence
  • Cellular Automata
  • Cloud Computing
  • Competitive Programming
  • Compiler Design
  • Computer Science
  • Computer Vision
  • Containers
  • Database
  • Datamining
  • Information Retrieval
  • Licensing
  • Machine Learning
  • Mathematics
  • Mathematics For Computer Science
  • Misc
  • MOOC
  • Networking
  • Open Source Ecosystem
  • Operating Systems
  • Parallel Programming
  • Partial Evaluation
  • Professional Development
  • Programming Paradigms
  • Regular Expressions
  • Reverse Engineering
  • Security
  • Software Architecture
  • Standards
  • Theoretical Computer Science
  • Web Performance
• LaTeX / TeX
  • LaTeX
  • TeX
• Limbo
• Linux
• Lisp
• Livecode
• Lua
• Make
• Markdown
• Mathematica
• MATLAB
• Maven
• Mercurial
• Mercury
• Meta-Lists
• Modelica
• MySQL
• Neo4J
• .NET Framework
• Nim
• NoSQL
• Oberon
• Objective-C
• OCaml
• Octave
• OpenMP
• OpenResty
• OpenSCAD
• Perl
• PHP
  • CakePHP
  • CodeIgniter
  • Drupal
  • Laravel
  • Symfony
  • Zend
• PicoLisp
• PostgreSQL
• PowerShell
• Processing
• Prolog
  • Constraint Logic Programming
• PureScript
• Python
  • Django
  • Flask
  • Kivy
  • Pandas
  • Pyramid
  • Tornado
• QML
• R
• Racket
• Raku
• Raspberry Pi
• REBOL
• Ruby
  • RSpec
  • Ruby on Rails
  • Sinatra
• Rust
• Sage
• Scala
  • Lift
  • Play Scala
• Scheme
• Scilab
• Scratch
• Sed
• Self
• Smalltalk
• Snap
• Spark
• Splunk
• SQL (implementation agnostic)
• SQL Server
• Standard ML
• Subversion
• Swift
  • Vapor
• Tcl
• TEI
• Teradata
• Tizen
• TLA
• TypeScript
  • Angular
  • Deno
• Unix
• Verilog
• VHDL
• Vim
• Visual Basic
• Visual Prolog
• Web Services
• Windows 8
• Windows Phone
• Workflow
• xBase (dBase / Clipper / Harbour)

Meta-Lists

• atariarchives.org atariarchives.org makes books, information, and software for Atari and other classic computers available on the Web.
• Bento
• Bitsavers.org
• Bookboon: IT & Programming Cookie required. (email address requested, not required)
• conceptf1.blogspot.com
• Free Smalltalk Books, collected by Stéphane Ducasse
• Free Tech Books
• Goalkicker - Programming Notes for Professionals books
• IBM Redbooks
• InfoQ Minibooks
• InTech: Computer and Information Science
• JSBooks - directory of free javascript ebooks
• Learn X in Y minutes
• Learneroo Resources to Learn Programming
• Microsoft Guides to Software
• Microsoft Press: Free E-Books
• Microsoft Technologies 1, including books on Windows Azure, SharePoint, Visual Studio Guide, Windows phone development, ASP.net, Office365, etc. collection by Eric Ligman
• Microsoft Technologies 2, including books on Windows Azure, SharePoint, Visual Studio Guide, Windows phone development, ASP.net, etc. collection by Eric Ligman
• O'Reilly's Open Books Project
• Papers we love
• Programming - Wikibooks
• Red Gate Books
• Stef's Free Online Smalltalk Books
• TechBeamers.com
• TechBooksForFree.com
• The Definitive C++ Book Guide and List
• Theassayer.org
• tutorialspoint

Graphics Programming

• 3D Game Shaders For Beginners - David Lettier (Git) (HTML)
• Blender 3D: Noob to Pro - Wikibooks
• Blender Manual
• Computer Graphics from scratch - Gabriel Gambetta (🚧 in process)
• DirectX manual (draft)
• GPU Gems
• Graphics Programming Black Book - Michael Abrash
• Introduction to Modern OpenGL - Alexander Overvoorde (HTML, EPUB, PDF) (C++)
• Introduction to TouchDesigner 099 (Leanpub account or valid email requested)
• Learn Computer Graphics From Scratch! - Scratchapixel (🚧 in process)
• Learn OpenGL - Joey de Vries
• Learn OpenGL RS - Benjamin Wasty et al. (🚧 in process) (Rust)
• Learning Modern 3D Graphics Programming - Jason L. McKesson (draft)
• Notes for a Computer Graphics Programming Course - Dr. Steve Cunningham (PDF)
• OpenGL - Concepts and illustrations.
• ShaderX series - Wolfgang Engel
• Tutorials for modern OpenGL
• WebGL Insights - Patrick Cozzi and Contributors

Vulkan

• Vulkan Tutorial - Alexander Overvoorde (EPUB, HTML, PDF) (C++)
• Vulkan Tutorial Java - Cristian Herrera et al (Java)
• Vulkan Tutorial RS - Benjamin Wasty et al. (🚧 in process) (Rust)
• Vulkano - Tomaka et al. (HTML) (Rust)

Graphical User Interfaces

• Programming with gtkmm 3
• Search User Interfaces - Marti A. Hearst
• The GLib/GTK+ Development Platform - Sébastien Wilmet (PDF)

GraphQL

• Fullstack GraphQL

Language Agnostic

Algorithms & Data Structures

• A Field Guide To Genetic Programming - Riccardo Poli et al. (PDF)
• Algorithm Design - Jon Kleinberg and Éva Tardos (PDF)
• Algorithmic Graph Theory
• Algorithms - Wikibooks
• Algorithms, 4th Edition - Robert Sedgewick and Kevin Wayne
• Algorithms and Automatic Computing Machines (1963) - B. A. Trakhtenbrot
• Algorithms and Complexity - Herbert S. Wilf (PDF)
• Algorithms Course Materials - Jeff Erickson
• Algorithms Notes for Professionals - Compiled from StackOverflow Documentation (PDF)
• Analysis and Design of Algorithms - Sandeep Sen, IIT Delhi
• Animated Algorithm and Data Structure Visualization (Resource)
• Annotated Algorithms in Python: Applications in Physics, Biology, and Finance - Massimo di Pierro
• Binary Trees (PDF)
• Data Structures - Prof. Subhashis Banerjee, IIT Delhi
• Data Structures (Into Java) - Paul N. Hilfinger (PDF)
• Data Structures and Algorithms: Annotated Reference with Examples - G. Barnett and L. Del Tongo
• Data Structures Succinctly Part 1, Syncfusion (PDF, Kindle) (email address requested, not required)
• Data Structures Succinctly Part 2, Syncfusion (PDF, Kindle) (email address requested, not required)
• Elementary Algorithms - Larry LIU Xinyu
• Foundations of Computer Science - Al Aho and Jeff Ullman
• Geometry Algorithms - Dan Sunday
• Lectures Notes on Algorithm Analysis and Computational Complexity (Fourth Edition) - Ian Parberry (use form at bottom of license)
• LEDA: A Platform for Combinatorial and Geometric Computing - K. Mehlhorn et al.
• Linked List Basics (PDF)
• Linked List Problems (PDF)
• Matters Computational: Ideas, Algorithms, Source Code (PDF)
• Open Data Structures: An Introduction - Pat Morin
• Planning Algorithms
• Problems on Algorithms (Second Edition) - Ian Parberry (use form at bottom of license)
• Purely Functional Data Structures (1996) - Chris Okasaki (PDF)
• Sequential and parallel sorting algorithms
• Text Algorithms (PDF)
• The Algorithm Design Manual
• The Art of Computer Programming - Donald Knuth (fascicles, mostly volume 4)
• The Design of Approximation Algorithms (PDF)
• The Great Tree List Recursion Problem (PDF)
• The Kademlia Protocol Succinctly - Marc Clifton
• Think Complexity - Allen B. Downey (2nd Edition) (PDF, HTML)

Artificial Intelligence

• Artificial Intelligence for Big Data - Anand Deshpande, Manish Kumar (Packt account required)
• Introduction to Autonomous Robots - Nikolaus Correll (PDF)
• The Quest for Artificial Intelligence: A History of Ideas and Achievements - Nils J. Nilsson (PDF)

Cellular Automata

• A New Kind of Science - Stephen Wolfram

Cloud Computing

• Azure for Architects, Third Edition (PDF) (email address or account required)
• Azure Functions Succinctly, Syncfusion (PDF, Kindle) (email address requested, not required)
• Cloud Computing for Science and Engineering - Ian Foster, Dennis B. Gannon (🚧 in process)
• Cloud Design Patterns
• Designing Distributed Systems (account required)
• Hands-On Cloud Administration in Azure - Mustafa Toroman (Packt account required)
• Learn Azure in a Month of Lunches - Iain Foulds (PDF)
• Monitoring Modern Infrastructure (account required)
• Multi-tenant Applications for the Cloud, 3rd Edition
• OpenStack Operations Guide
• Streamline microservice management with Istio Service Mesh (account required)
• The Developer’s Guide to Azure

Competitive Programming

• Competitive Programmer's Handbook - Antti Laaksonen (PDF)
• Competitive Programming, 1st Edition - Steven Halim (PDF)
• Competitive Programming, 2nd Edition - Steven Halim (PDF)
• Principles of Algorithmic Problem Solving - Johan Sannemo (PDF)

Compiler Design

• An Introduction to GCC - Brian Gough
• Basics of Compiler Design (Anniversary Edition) - Torben Mogensen
• Compiler Design in C (1990) - Allen Holub, Prentice Hall
• Compiler Design: Theory, Tools, and Examples, C/C++ Edition - Seth D. Bergmann
• Compiler Design: Theory, Tools, and Examples, Java Edition - Seth D. Bergmann
• Compiling Scala for the Java Virtual Machine - Michel Schinz (PDF)
• Compiling Techniques (1969) - F.R.A. Hopgood, Macdonald
• Crafting Interpreters (🚧) - Bob Nystrom (HTML)
• Implementing Functional Languages: A Tutorial - Simon Peyton Jones, David Lester
• Let's Build a Compiler (PDF)
• Practical and Theoretical Aspects of Compiler Construction (class lectures and slides)
• The ANTLR Mega Tutorial

Computer Science

• Computational Thinking - Jeannette Wing, Carnegie-Mellon University (PDF)
• Computer Science I - Draft - Dr. Chris Bourke (PDF) (🚧 in process)
• Computer Science II - Draft - Dr. Chris Bourke (PDF) (🚧 in process)
• CS Principles: Big Ideas in Programming - Mark Guzdial and Barbara Ericson (HTML)

Computer Vision

• Computer Vision - Dana Ballard, Chris Brown
• Computer Vision: Algorithms and Applications - Richard Szeliski
• Computer Vision: Models, Learning, and Inference - Simon J.D. Prince
• Mastering OpenCV 4, Third Edition - Roy Shilkrot, David Millán Escrivá (Packt account required)
• Programming Computer Vision with Python - Jan Erik Solem

Containers

• Docker Cookbook, Second Edition - Ken Cochrane, Jeeva S. Chelladhurai, Neependra K Khare (Packt account required)
• Docker Jumpstart - Andrew Odewahn
• Kubernetes Cookbook, Second Edition - Hideto Saito, Hui-Chuan Chloe Lee, Ke-Jou Carol Hsu (Packt account required)

Database

• Database Design, 2nd Ed. - Adrienne Watt, Nelson Eng (HTML, PDF, EPUB, Kindle)
• Database Explorations (PDF)
• Database Fundamentals (PDF)
• Databases, Types, and The Relational Model: The Third Manifesto (PDF)
• Foundations of Databases
• Readings in Database Systems, 5th Ed.
• Temporal Database Management - Christian S. Jensen
• The Theory of Relational Databases

Datamining

• A Programmer's Guide to Data Mining - Ron Zacharski (Draft)
• Data Jujitsu: The Art of Turning Data into Product (email address requested, not required)
• Data Mining Algorithms In R - Wikibooks
• Internet Advertising: An Interplay among Advertisers, Online Publishers, Ad Exchanges and Web Users (PDF)
• Introduction to Data Science - Jeffrey Stanton
• Introduction to Data Science - Rafael A Irizarry (Leanpub account or valid email requested)
• Mining of Massive Datasets
• School of Data Handbook
• Statistical inference for data science - Brian Caffo
• The Ultimate Guide to 12 Dimensionality Reduction Techniques (with Python codes) - Pulkit Sharma
• Theory and Applications for Advanced Text Mining

Information Retrieval

• Information Retrieval: A Survey (PDF)
• Introduction to Information Retrieval

Licensing

• Creative Commons: a user guide - Simone Aliprandi
• Open Source Licensing Software Freedom and Intellectual Property Law - Lawrence Rosen
• The Public Domain: Enclosing the Commons of the Mind - James Boyle

Machine Learning

• A Brief Introduction to Machine Learning for Engineers - Osvaldo Simeone (PDF)
• A Brief Introduction to Neural Networks
• A Comprehensive Guide to Machine Learning - Soroush Nasiriany, Garrett Thomas, William Wang, Alex Yang (PDF)
• A Course in Machine Learning (PDF)
• A First Encounter with Machine Learning (PDF)
• A Selective Overview of Deep Learning - Fan, Ma, and Zhong (PDF)
• Algorithms for Reinforcement Learning - Csaba Szepesvári (PDF)
• An Introduction to Statistical Learning - Gareth James, Daniela Witten, Trevor Hastie and Robert Tibshirani
• Bayesian Reasoning and Machine Learning
• Deep Learning - Ian Goodfellow, Yoshua Bengio and Aaron Courville
• Deep Learning with PyTorch - Eli Stevens, Luca Antiga, Thomas Viehmann (PDF)
• Dive into Deep Learning
• Explorations in Parallel Distributed Processing: A Handbook of Models, Programs, and Exercises - James L. McClelland
• Foundations of Machine Learning, Second Edition - Mehryar Mohri, Afshin Rostamizadeh, Ameet Talwalkar
• Free and Open Machine Learning - Maikel Mardjan
• Gaussian Processes for Machine Learning
• IBM Machine Learning for Dummies - Judith Hurwitz, Daniel Kirsch
• Information Theory, Inference, and Learning Algorithms
• Interpretable Machine Learning - Christoph Molnar
• Introduction to CNTK Succinctly - James McCaffrey
• Introduction to Machine Learning - Amnon Shashua
• Keras Succinctly - James McCaffrey
• Learn Tensorflow - Jupyter Notebooks
• Learning Deep Architectures for AI (PDF)
• Machine Learning
• Machine Learning for Data Streams - Albert Bifet, Ricard Gavaldà, Geoff Holmes, Bernhard Pfahringer
• Machine Learning from Scratch - Danny Friedman
• Machine Learning, Neural and Statistical Classification
• Mathematics for Machine Learning - Garrett Thomas (PDF)
• Mathematics for Machine Learning - Marc Peter Deisenroth, A Aldo Faisal, and Cheng Soon Ong
• Neural Networks and Deep Learning
• Probabilistic Models in the Study of Language (Draft, with R code)
• Python Machine Learning Projects - Lisa Tagliaferri and Brian Boucheron (PDF, EPUB, MOBI)
• Reinforcement Learning: An Introduction - Richard S. Sutton, Andrew G. Barto (PDF)
• Speech and Language Processing (3rd Edition Draft) - Daniel Jurafsky, James H. Martin (PDF)
• The Elements of Statistical Learning - Trevor Hastie, Robert Tibshirani, and Jerome Friedman
• The LION Way: Machine Learning plus Intelligent Optimization - Roberto Battiti, Mauro Brunato (PDF)
• The Python Game Book
• Top 10 Machine Learning Algorithms Every Engineer Should Know - Binny Mathews and Omair Aasim
• Understanding Machine Learning: From Theory to Algorithms - Shai Shalev-Shwartz, Shai Ben-David

Mathematics

• A First Course in Linear Algebra - Robert A. Beezer
• Abstract Algebra: Theory and Applications - Thomas W. Judson
• Advanced Algebra - Anthony W. Knapp (PDF)
• Algebra: An Elementary Text-Book, Part I (1904) - G. Chrystal (PDF)
• Algebra: An Elementary Text-Book, Part II (1900) - G. Chrystal (PDF)
• Algebraic Topology - Allen Hatcher (PDF)
• An Introduction to the Theory of Numbers - Leo Moser (PDF)
• Analytic Geometry (1922) - Lewis Parker Siceloff, George Wentworth, David Eugene Smith (PDF)
• Basic Algebra - Anthony W. Knapp (PDF)
• Basics of Algebra, Topology, and Differential Calculus (PDF)
• Bayesian Methods for Hackers - Cameron Davidson-Pilon
• Beginning and Intermediate Algebra - Tyler Wallace
• Book of Proof - Richard Hammack (PDF)
• Calculus - Gilbert Strang (PDF)
• Calculus Made Easy - Silvanus P. Thompson (PDF)
• Category Theory for the Sciences - David I. Spivak
• CK-12 Probability and Statistics - Advanced
• Collaborative Statistics
• Complex Analysis - George Cain
• Computational and Inferential Thinking. The Foundations of Data Science
• Computational Geometry
• Concepts & Applications of Inferential Statistics
• Convex Optimization - Stephen Boyd and Lieven Vandenberghe
• Coordinate Geometry (1911) - Henry Buchard Fine and Henry Dallas Thompson (PDF)
• Differential Equations - Paul Dawkins (PDF, use download menu to download)
• Differential Equations (1922) - H. B. Phillips (PDF)
• Elementary Differential Equations - William F. Trench (PDF)
• Elements of Differential and Integral Calculus (1911) - William Anthony Granville (PDF)
• Essentials of Metaheuristics - Sean Luke
• First Course in Algebra (1910) - Herbert E. Hawkes, William A. Luby, Frank C. Touton (PDF)
• Foundations of Constructive Probability Theory - Yuen-Kwok Chan (PDF)
• Graph Theory
• Introduction to Probability - Charles M. Grinstead and J. Laurie Snell
• Introduction to Probability and Statistics Spring 2014
• Introduction to Proofs - Jim Hefferon
• Introduction to Statistical Thought - Michael Lavine
• Kalman and Bayesian Filters in Python
• Knapsack Problems - Algorithms and Computer Implementations - Silvano Martello and Paolo Toth
• Lecture Notes of Linear Algebra - Dr. P. Shunmugaraj, IIT Kanpur (PDF)
• Lies, Damned Lies, or Statistics: How to Tell the Truth with Statistics - Jonathan A. Poritz (PDF)
• Linear Algebra - Dr. Arbind K Lal, Sukant Pati (PDF) (🚧 in process)
• Linear Algebra (PDF)
• Linear Algebra by Jim Hefferon - Jim Hefferon
• Linear Algebra, Infinite Dimensions, and Maple - James Herod
• Linear Methods of Applied Mathematics - Evans M. Harrell II and James V. Herod
• Magic Squares and Cubes (1917) - W. S. Anderson (PDF)
• Mathematical Logic - an Introduction (PDF)
• Mathematics, MTH101A - P. Shunmugaraj, IIT Kanpur
• Modern Statistics for Modern Biology - Susan Holmes and Wolfgang Huber
• Multivariable Calculus - George Cain and James Herod
• Non-Uniform Random Variate Generation - Luc Devroye (PDF)
• Number Theory - Holden Lee MIT
• Odds and Ends: Introducing Probability & Decision with a Visual Emphasis - Jonathan Weisberg
• OpenIntro Statistics
• Ordinary Differential Equations - Wikibooks
• Plane Geometry (1913) - George Wentworth and David Eugene Smith (PDF)
• Planes and Spherical Trigonometry (1915) - George Wentworth and David Eugene Smith (PDF)
• Precalculus - Carl Stitz and Jeff Zeager (PDF)
• Probability and Statistics Cookbook
• Probability and Statistics EBook
• Recreations in Math - H. E. Licks (PDF)
• Second Course in Algebra - Herbert E. Hawkes, William A. Luby, Frank C. Touton (PDF)
• Seven Sketches in Compositionality: An Invitation to Applied Category Theory - Brendan Fong and David I. Spivak (PDF)
• Statistical Thinking for the 21st Century - Russell A. Poldrack
• Statistics Done Wrong - Alex Reinhart
• The Joy of Cryptography (2020) - Mike Rosulek (PDF) (🚧 in process)
• Think Bayes: Bayesian Statistics Made Simple - Allen B. Downey
• Think Stats: Probability and Statistics for Programmers - Allen B. Downey (using Python)
• Vector calculus - Michael Corral (PDF)
• Yet Another Introductory Number Theory Textbook - Jonathan A. Poritz (PDF)

Mathematics For Computer Science

• A Mathematical Theory of Communication - Claude E.Shannon
• Discrete Structures for Computer Science: Counting, Recursion, and Probability - Michiel Smid

Misc

• 10 Keys to Great Landing Pages - iThemes Media (PDF)
• 2016 European Software Development Salary Survey
• 2016 Software Development Salary Survey
• 2D Game Development: From Zero To Hero (🚧 in process)
• 97 Things Every Programmer Should Know - Extended (Leanpub account or valid email requested)
• A MACHINE MADE THIS BOOK ten sketches of computer science - JOHN WHITINGTON (PDF)
• Ansible Up & Running (first three chapters) (account required)
• Asterisk™: The Definitive Guide
• Barcode Overview (PDF)
• Bitcoin and Cryptocurrency Technologies - Arvind Narayanan, Joseph Bonneau, Edward Felten, Andrew Miller, Steven Goldfeder (PDF)
• Blockchain By Example - Bellaj Badr, Richard Horrocks, Xun (Brian) Wu (Packt account required)
• Coding With Minecraft - Al Sweigart
• Come, Let's Play: Scenario-Based Programming Using Live Sequence Charts
• Communicating Sequential Processes - Tony Hoare (PDF)
• Confessions of an Unintentional CTO: Lessons in Growing a Web App - Jack Kinsella
• Culture & Empire: Digital Revolution (PDF)
• Design With FontForge
• Designing Interfaces - Jennifer Tidwell
• DevDocs - Documents for Developers in 1 place
• DevOps For Dummies (IBM Edition) (PDF)
• Digital Signal Processing For Communications
• Digital Signal Processing For Engineers and Scientists
• Digital Signal Processing in Python - Allen B. Downey
• "DYNAMIC LINKED LIBRARIES": Paradigms of the GPL license in contemporary software - Luis A. Enríquez
• Effective DevOps with AWS, Second Edition - Yogesh Raheja, Giuseppe Borgese, Nathaniel Felsen (Packt account required)
• Essential Image Optimization - Addy Osmani
• Foundations of Programming (PDF)
• Game AI Pro - Steve Rabin
• Game Programming Patterns - Bob Nystrom
• Getting Real
• Google Maps API Succinctly - Mark Lewin
• Hacknot: Essays on Software Development - Ed Johnson
• Hello SDL - Lazy Foo' Productions
• High-Performance Scientific Computing (class lectures and slides)
• HoloLens Succinctly - Lars Klint
• How Computers Work - R. Young
• How to Become a Programmer (PDF)
• How to Think Like a Computer Scientist - Peter Wentworth, Jeffrey Elkner, Allen B. Downey, and Chris Meyers
• Image Processing in C: Analyzing and Enhancing Digital Images - Dwayne Phillips
• Industrial Cybersecurity - Pascal Ackerman (Packt account required)
• Information Technology and the Networked Economy (PDF)
• Introduction to Scientific Programming in C++ and Fortran - Victor Eijkhout (PDF)
• IRPF90 Fortran code generator - Anthony Scemama
• Learn Programming - Antti Salonen
• Learn to Program
• Learning 30 Technologies in 30 Days: A Developer Challenge - Shekhar Gulati
• Linked Data Patterns: A pattern catalogue for modelling, publishing, and consuming Linked Data - Leigh Dodds, Ian Davis
• Magic Ink: Information Software and The Graphical Interface - Bret Victor
• Mastering Bitcoin - Unlocking digital currencies - Andreas M. Antonopoulos
• Mastering ROS for Robotics Programming, Second Edition - Lentin Joseph, Jonathan Cacace (Packt account required)
• Mobile Developer's Guide to the Galaxy (Leanpub account or valid email requested)
• Modeling Reactive Systems with Statecharts
• MSIX Succinctly - Matteo Pagani
• Networks, Crowds, and Markets: Reasoning About a Highly Connected World
• Object-Oriented Reengineering Patterns - Serge Demeyer, Stéphane Ducasse and Oscar Nierstrasz
• Open Government; Collaboration, Transparency, and Participation in Practice - Daniel Lathrop, Laurel Ruma
• Packt Publishing: A free book every day (PDF, ePub, Mobi, Kindle) (account required)
• PDQ: Pretty Darn Quick: An Agile, All-Purpose Methodology - Jeff Franz-Lien (Leanpub account or valid email requested)
• Philosophy of Computer Science (PDF)
• Playtime with Hyperledger Composer - Shubham Chadokar (PDF)
• PNG: The Definitive Guide
• Pointers And Memory (PDF)
• Principles of Computer System Design (PDF)
• Procedural Content Generation in Games - Noor Shaker, Julian Togelius, Mark Nelson
• Programming with Unicode
• Real-World Maintainable Software - Abraham Marin-Perez
• Record-Playback Test Automation: Sahi & Selenium IDE: Critical Evaluation of Record-Playback Automation Tools - Shashikant Jagtap (Leanpub account or valid email requested)
• Scientific Programming and Computer Architecture - Divakar Viswanath
• Signal Computing: Digital Signals in the Software Domain - Michael Stiber, Bilin Zhang Stiber, Eric C. Larson (PDF)
• Small Memory Software
• Web Almanac (PDF)
• Writing Native Mobile Apps in a Functional Language Succinctly - Vassili Kaplan

MOOC

• Coursera
• edX
• freeCodeCamp
• FutureLearn
• MIT OCW
• NPTEL
• openHPI
• openSAP
• Platzi
• Udacity

Networking

• An Introduction to Computer Networks (HTML, PDF, Kindle)
• Bits, Signals, and Packets: An Introduction to Digital Communications and Networks
• Code Connected vol.1 (PDF) (book on ZeroMQ)
• Computer Networking : Principles, Protocols and Practice (HTML, ePub, PDF, Kindle)
• Computer Networks: A Systems Approach - Larry Peterson and Bruce Davie (HTML, epub, mobi, PDF)
• Distributed systems for fun and profit
• High-Performance Browser Networking - Ilya Grigorik
• How HTTPS Works - DNSimple
• HTTP Succinctly, Syncfusion (PDF, Kindle) (email address requested, not required)
• HTTP2 Explained - Daniel Stenberg
• Introduction to HTTP - Launch School
• IPv6 for IPv4 Experts - Yar Tikhiy (PDF)
• Kafka, The definitive Guide - Neha Narkhede (PDF)
• Network Science - Albert-Laszló Barabási
• The TCP/IP Guide
• Understanding IP Addressing: Everything you ever wanted to know (PDF)
• ZeroMQ Guide

Open Source Ecosystem

• Data Journalism Handbook
• Free as in Freedom: Richard Stallman and the free software revolution - Sam Williams (PDF)
• Free for All - Peter Wayner
• Free Software, Free Society: Selected Essays of Richard M. Stallman
• Getting Started with InnerSource (email address requested, not required)
• Getting started with Open source development (PDF)
• GitLab Handbook
• How to get started with open source (ePub & ODT)
• Innovation Happens Elsewhere - Ron Goldman, Richard P. Gabriel
• Introduction to Networking - Charles Severance (PDF)
• Open Advice: FOSS: What We Wish We Had Known When We Started
• Open source in Brazil - Andy Oram
• Producing Open Source Software - Karl Fogel
• The Architecture of Open Source Applications: Vol. 1: Elegance, Evolution, and a Few Fearless Hacks; Vol. 2: Structure, Scale, and a Few More Feerless Hacks
• The Art of Community - Jono Bacon (PDF)
• The Cathedral and the Bazaar - Eric S. Raymond
• The Future of the Internet - Jonathan Zittrain
• The Open Source Way
• The Wealth of Networks: How Social Production Transforms Markets and Freedom - Yochai Benkler

Operating Systems

• A short introduction to operating systems (2001) - Mark Burgess (PDF)
• Computer Science from the Bottom Up
• How to Make a Computer Operating System (🚧 in process)
• How to write a simple operating system in assembly language - Mike Saunders (HTML)
• Operating Systems and Middleware (PDF and LaTeX)
• Operating Systems: Three Easy Pieces (PDF)
• Practical File System Design: The Be File System - Dominic Giampaolo (PDF)
• Project Oberon: The Design of an Operating System, a Compiler, and a Computer - Niklaus Wirth & Jürg Gutknecht (PDF)
• The Art of Unix Programming - Eric S. Raymond
• The Design and Implementation of the Anykernel and Rump Kernels - Antti Kantee
• The little book about OS development - Erik Helin, Adam Renberg
• The Little Book of Semaphores - Allen B. Downey
• Think OS: A Brief Introduction to Operating Systems - Allen B. Downey (PDF)
• UNIX Application and System Programming, lecture notes - Prof. Stewart Weiss (PDF)
• Writing a Simple Operating System from Scratch - Nick Blundell (PDF)
• Xv6, a simple Unix-like teaching operating system

Parallel Programming

• High Performance Computing - Charles Severance & Kevin Dowd (PDF, ePUB)
• High Performance Computing Training (LLNL materials)
• High-Performance Scientific Computing (class lectures and slides)
• Introduction to High-Performance Scientific Computing - Victor Eijkhout
• Introduction to Parallel Computing - Blaise Barney
• Is Parallel Programming Hard, And, If So, What Can You Do About It? - Paul E. McKenney
• Programming on Parallel Machines; GPU, Multicore, Clusters and More - Norm Matloff Kerridge (PDF) (email address requested, not required)
• The OpenCL Programming Book
• Using Concurrency and Parallelism Effectively – I - Jon Kerridge (PDF) (email address requested, not required)
• Using Concurrency and Parallelism Effectively – II - Jon

Partial Evaluation

• Partial Evaluation and Automatic Program Generation - (PDF) Jones, Gomard and Sestoft

Professional Development

• Clean Code Developer: An initiative for more professionalism in software development (🚧 in process)
• Confessions of an IT Manager - Phil Factor (PDF)
• Don't Just Roll the Dice - Neil Davidson (PDF)
• How to Do What You Love & Earn What You’re Worth as a Programmer - Reginald Braithwaite
• Professional Software Development For Students - Mike G. Miller
• What I've Learned From Failure - Reginald Braithwaite

Programming Paradigms

• Flow based Programming - J Paul Morrison
• Introduction to Functional Programming - J. Harrison
• Making Sense of Stream Processing - Martin Kleppmann (PDF)
• Mostly Adequate Guide to Functional Programming - Mostly Adequate Core Team
• The Pure Function Pipeline Data Flow v3.0 ---- the Grand Unified Programming Theory - Lin Pengcheng
• Type Theory and Functional Programming

Regular Expressions

• JavaScript RegExp - Sundeep Agarwal
• Python re(gex)? - Sundeep Agarwal
• Regular Expressions for Regular Folk - Shreyas Minocha
• RexEgg
• Ruby Regexp - Sundeep Agarwal
• The 30 Minute Regex Tutorial - Jim Hollenhorst
• The Bastards Book of Regular Expressions: Finding Patterns in Everyday Text - Dan Nguyen (Leanpub account or valid email requested)

Reverse Engineering

• BIOS Disassembly Ninjutsu Uncovered 1st Edition - Darmawan Salihun (PDF)
• Hacking the Xbox: An Introduction to Reverse Engineering - Andrew "bunnie" Huang
• iOS App Reverse Engineering (PDF)
• Reverse Engineering for Beginners - Dennis Yurichev (PDF)

Security

• A Graduate Course in Applied Cryptography
• Crypto 101 - Crypto for everyone
• CryptoParty Handbook
• Handbook of Applied Cryptography
• How HTTPS works - dnsimple
• How to deal with Passwords
• Intrusion Detection Systems with Snort (PDF)
• OpenSSL Cookbook
• OWASP Mobile Security Testing Guide - Bernhard Mueller et al.
• OWASP Testing Guide 4.0 (PDF)
• OWASP Top 10 for .NET Developers
• Security Engineering

Software Architecture

• Agile Planning: From Ideas to Story Cards - Launch School
• Architectural Styles and the Design of Network-based Software Architectures - Roy Thomas Fielding
• Best Kept Secrets of Peer Code Review
• Building Secure & Reliable Systems - Heather Adkins, Betsy Beyer, Paul Blankinship, Piotr Lewandowski, Ana Oprea & Adam Stubblefield (PDF)
• Data-Oriented Design
• Developing Reactive Microservices (email address requested, not required)
• Domain Driven Design Quickly
• DSL Engineering: Designing, Implementing and Using Domain-Specific Languages - Markus Voelter
• Exploring CQRS and Event Sourcing - (EPUB, PDF)
• Guide to the Software Engineering Body of Knowledge (email adddress requested)
• How to Design Programs
• How to Write Unmaintainable Code
• Kanban and Scrum - making the most of both
• Kanban for skeptics - Nick Oostvogels (Leanpub account or valid email requested)
• Microservices AntiPatterns and Pitfalls (PDF)
• Microservices vs. Service-Oriented Architecture (PDF)
• Migrating to Cloud-Native Application Architectures (email address requested) (PDF)
• Naked objects - Richard Pawson (PDF)
• OAuth - The Big Picture (email address requested)
• Object-Oriented Reengineering Patterns - S. Demeyer, S. Ducasse and O. Nierstrasz
• Practicing Domain-Driven Design - Part 1 - Scott Millett (Leanpub account or valid email requested)
• Reactive Microservices Architecture (email address requested)
• Reactive Microsystems: The Evolution of Microservices at Scale (email address requested)
• Scrum and XP from the Trenches
• Serverless apps: Architecture, patterns, and Azure implementation
• Serverless Design Patterns and Best Practices - Brian Zambrano (Packt account required)
• Shape Up - Stop Running in Circles and Ship Work that Matters - Ryan Singer (PDF)
• Site Reliability Engineering
• Software Architecture Patterns (email address requested, not required)
• Software Engineering for Internet Applications
• Source Making Design Patterns and UML
• Test Driven Development, Extensive Tutorial - Grzegorz Gałęzowski
• The Site Reliability Workbook - Betsy Beyer, Niall Richard Murphy, David K. Rensin, Kent Kawahara and Stephen Thorne
• Web API Design - Brian Mulloy (PDF)
• Working with Web APIs - Launch School
• Your API Is Bad - Paddy Foran

Standards

• Linux Standard Base
• UNIX - The POSIX Standard - IEEE Std 1003.1

Theoretical Computer Science

• Building Blocks for Theoretical Computer Science - Margaret M. Fleck
• Category Theory for Computing Science (PDF)
• Category Theory for Programmers - Bartosz Milewski (PDF)
• Design of a Programmer - Prakash Hegade (PDF)
• Homotopy Type Theory: Univalent Foundations of Mathematics (PDF)
• Introduction to Computer Science - Prof. Subhashis Banerjee, IIT Delhi
• Introduction to Computing
• Introduction to Theory of Computation - Anil Maheshwari and Michiel Smid (PDF)
• Models of Computation - John E. Savage
• Practical Foundations for Programming Languages, Preview - Robert Harper (PDF)
• Principles of Programming Languages - Scott F. Smith
• Programming and Programming Languages - Shriram Krishnamurthi
• Programming in Martin-Löf's Type Theory - Bengt Nordstroem
• Programming Languages: Application and Interpretation (2nd Edition) - Shriram Krishnamurthi
• Programming Languages: Theory and Practice - Robert Harper (PDF)
• Semantics with Applications: A Formal Introduction - Hanne Riis Nielson, Flemming Nielson (PDF)
• Structure and Interpretation of Computer Programs
• Structure and Interpretation of Computer Programs
• The Black Art of Programming - Mark McIlroy
• The Craft of Programming - John C. Reynolds
• Think Complexity - - Allen B. Downey (2nd Edition) (PDF, HTML)

Web Performance

• Book of Speed - Stoyan Stefanov
• Designing for Performance - Lara Hogan
• High Performance Accelerated Websites - Anshul (HTML) (🚧 in process)
• High Performance Browser Networking - Ilya Grigorik
• Mature Optimization - Carlos Bueno (PDF)

ABAP

• SAP Code Style Guides - Clean ABAP

Ada

• A Guide to Ada for C and C++ Programmers (PDF)
• Ada Distilled (PDF)
• Ada for the C++ or Java Developer - Quentin Ochem (PDF)
• Ada Programming - Wikibooks
• Ada Reference Manual - ISO/IEC 8652:2012(E) Language and Standard Libraries (PDF)
• Introduction To Ada
• Introduction To SPARK
• The Big Online Book of Linux Ada Programming

Agda

• Agda Tutorial
• Programming Language Foundations in Agda - Philip Wadler and Wen Kokke

Alef

• Alef Language Reference Manual

Android

• Android 4 App Development Essentials
• Android Notes for Professionals - Compiled from StackOverflow Documentation (PDF)
• Android Programming Succinctly, Syncfusion (PDF, Kindle) (email address requested, not required)
• Android Tutorial - Tutorials Point
• Codelabs for Advanced Android Development
• CodePath Android Cliffnotes
• Coreservlets Android Programming Tutorial
• Expert Android and Eclipse development knowledge
• Google Android Developer Training
• Styling Android
• The Busy Coder's Guide to Android Development (PDF - older versions)

APL

• A Practical Introduction to APL1 & APL2 - Graeme Donald Robertson (PDF)
• A Practical Introduction to APL3 & APL4 - Graeme Donald Robertson (PDF)
• Mastering Dyalog APL (PDF)

Arduino

• Arduino Programming Notebook - Brian Evans
• Arduino Tips, Tricks, and Techniques - lady ada (PDF)
• Getting started with Arduino – A Beginner’s Guide - Brad Kendall (PDF)
• Getting Started with Arduino products - Official Arduino Documentation (🚧 in process)
• Introduction to Arduino
• Introduction to Arduino : A piece of cake! - Alan G. Smith
• Open softwear - Fashionable prototyping and wearable computing using the Arduino - Tony Olsson, David Gaetano, Jonas Odhner, Samson Wiklund (PDF)

ASP.NET

• Architecting Modern Web Applications with ASP.NET Core and Microsoft Azure (2020) - Steve "ardalis" Smith (PDF) (🚧 in process)
• ASP.NET Core 2 Succinctly - Simone Chiaretta, Ugo Lattanzi
• ASP.NET MVC Music Store
• ASP.NET WebHooks Succinctly - Gaurav Arora
• ASP.NET with C# (2008) - Vijay Mukhi, Sonal Mukhi, Neha Kotecha
• Diving into ASP.NET WebAPI (2016) - Akhil Mittal (PDF)
• Intro to ASPNET MVC 4 with Visual Studio 2011 Beta (2012) - Rick Anderson and Scott Hanselman (PDF)
• Introducing ASP.NET Web Pages 2 (2012) - Mike Pope (PDF)
• The Little ASP.NET Core Book (2018) - Nate Barbettini (PDF)

Assembly Language

• An introduction to reverse engineering for beginners - Dennis Yurichev (PDF)
• ARM Assembly Language Programming - Peter Knaggs (PDF) (🚧 in process)
• Assemblers And Loaders (1993) - David Salomon (PDF)
• Assembly Language Succinctly (PDF)
• PC Assembly Language - P. A. Carter
• Professional Assembly Language (PDF)
• Programming from the Ground Up - Jonathan Bartlett (PDF)
• Ralf Brown's Interrupt List
• Software optimization resources - A. Fog
• The Art of Assembly Language (2003) - Randall Hyde (PDF)
• Wizard Code, A View on Low-Level Programming - Tuomo Tuomo Venäläinen (PDF)
• x86-64 Assembly Language Programming with Ubuntu - Ed Jorgensen (PDF)
• x86 Assembly - Wikibooks
• x86 Disassembly - Wikibooks
• Zen of Assembly Language: Volume I, Knowledge (1990) - Michael Abrash

Non-X86

• Easy 6502 - Nick Morgan
• Machine Code for Beginners [Z80 and 6502 CPUs] - Lisa Watts and Mike Wharton (PDF) (Scroll to bottom and click on book cover)
• Machine Language for Beginners - Richard Mansfield [6502 CPU]
• Programmed Introduction to MIPS Assembly Language
• The Second Book of Machine Language

AutoHotkey

• AHKbook - the book for AutoHotkey
• AutoHotkey Official Documentation (CHM)

Autotools

• Autotools Mythbuster
• GNU Autoconf, Automake and Libtool

Awk

• An Awk Primer - Wikibooks
• Awk - Bruce Barnett
• Gawk: Effective AWK Programming - Arnold D. Robbins (HTML, PDF)

Bash

• Advanced Bash-Scripting Guide - M. Cooper (HTML)
• Bash Guide for Beginners (2008) - M. Garrels (HTML)
• Bash Notes for Professionals - Compiled from StackOverflow documentation (PDF)
• BASH Programming (2000) - Mike G. (HTML)
• Bash Reference Manual (HTML)
• Bash tutorial - Anthony Scemama (PDF)
• BashGuide - Maarten Billemont (HTML) (PDF)
• Conquering the Command Line - Mark Bates (HTML)
• Getting Started with BASH (HTML)
• Google Shell Style Guide - Paul Armstrong (HTML)
• Introduction to Bash Scripting - Bobby Iliev (Markdown, PDF)
• Introduction to the Command Line - Launch School (HTML)
• Linux Shell Scripting Tutorial - A Beginner's Handbook (2002) - Vivek G. Gite (HTML)
• Linux Shell Scripting Tutorial (LSST) v2.0 - Vivek Gite (HTML)
• Slackbook (2005) - Alan Hicks, Chris Lumens, David Cantrell and Logan Johnson (HTML, DocBook, Postscript, PDF)
• The Bash Academy - Maarten Billemont (HTML)
• The Linux Command Line - William E. Shotts, Jr. (PDF)
• Writing Shell Scripts - William E. Shotts, Jr. (HTML)

Basic

• 10 PRINT CHR$(205.5+RND(1)); : GOTO 10 - Nick Montfort, Patsy Baudoin, John Bell, Ian Bogost, Jeremy Douglass, Mark C. Marino, Michael Mateas, Casey Reas, Mark Sample, Noah Vawter
• A beginner's guide to Gambas - John W. Rittinghouse (PDF)
• Pick/Basic: A Programmer's Guide - Jonathan E. Sisk
• Visual Basic Essentials

BETA

• Object-Oriented Programming in the BETA Programming Language - Ole Lehrmann Madsen, Birger Møller-Pedersen, Kristen Nygaard
• MIA 90-02: BETA Compiler - Reference Manual - Mjølner Informatics
• MIA 94-26: BETA Language Introduction - Tutorial - Mjølner Informatics
• MIA 99-41: BETA Language Modifications - Reference Manual - Mjølner Informatics
• MIA 99-42: The Fragment System: Further Specification - Mjølner Informatics

Blazor

• Blazor: A Beginner's Guide - Ed Charbeneau (PDF) (email address requested, not required)
• Blazor for ASP.NET Web Forms Developers - Daniel Roth, Jeff Fritz, Taylor Southwick (PDF)

C

• 256-Color VGA Programming in C - David Brackeen
• A Tutorial on Pointers and Arrays in C - Ted Jensen (PDF)
• An Introduction to C & GUI Programming - Simon Long (PDF)
• Bare-metal programming for ARM - Daniels Umanovskis (PDF)
• Beej's Guide to C Programming - B. Hall (HTML, PDF)
• Beej's Guide to Network Programming - Using Internet Sockets - B. Hall
• Beej's Guide to the GNU Debugger (GDB) - B. Hall (HTML)
• Build Your Own Lisp - Daniel Holden
• C Elements of Style - Steve Oualline
• C for Python Programmers - Carl Burch
• C Notes for Professionals - Compiled from StackOverflow Documentation (PDF)
• C Programming - Wikibooks
• C Programming Boot Camp - Paul Gribble
• Deep C
• Essential C - Nick Parlante (PDF)
• Everything you need to know about pointers in C - Peter Hosey
• Functional C (1997) - Pieter H. Hartel, Henk Muller (PDF)
• Hashing - Prakash Hegade
• Learn to Code With C - The MagPi Essentials (PDF)
• Learning GNU C - Ciaran O’Riordan (PDF)
• Modeling with Data - Ben Klemens (PDF)
• Modern C - Jens Gustedt (PDF)
• Object-Oriented Programming With ANSI-C (PDF)
• Programming in C - Bharat Kinariwala & Tep Dobry
• Programming in C - Kishori Mundargi
• Structures and C - Prakash Hegade
• The C book - Mike Banahan, Declan Brady and Mark Doran (PDF, HTML)
• The Craft of Text Editing or A Cookbook for an Emacs - Craig A. Finseth
• The Current C Programming Language Standard – ISO/IEC 9899:2018 (C17/C18), Draft - Open Standards Org - www.open-std.org (PDF)
• The GNU C Programming Tutorial - Mark Burgess, Ron Hale-Evans (PDF)
• The GNU C Reference Manual - Trevis Rothwell, James Youngman (HTML) (PDF)
• The little book about OS development - Erik Helin, Adam Renberg
• The New C Standard - An Economic and Cultural commentary (2009) - Derek M. Jones (PDF)
• TONC GBA Programming - Game Boy Advance Development

C Sharp

• C# Essentials
• C# Notes for Professionals - Compiled from StackOverflow documentation (PDF)
• C# Programming - Wikibooks
• C# Programming Yellow Book - Rob Miles (PDF) (2019)
• C# Smorgasbord - Filip Ekberg (HTML) (PDF, EPUB, MOBI) (2018)
• C# Tips - Jason Roberts (Leanpub account or valid email requested)
• Creating Mobile Apps with Xamarin.Forms C#
• Daily Design Patterns - Matthew P Jones (PDF)
• Data Structures and Algorithms with Object-Oriented Design Patterns in C# - Bruno Preiss
• Dissecting a C# Application - Christian Holm, Bernhard Spuida, Mike Kruger
• Fundamentals of Computer Programming with C# - Svetlin Nakov, Veselin Kolev & Co (HTML, PDF)
• High level asynchronous programming with Reactive Extensions - Emil Petro
• Introduction to Rx
• Learn C# in Y Minutes
• Mastering Xamarin UI Development, Second Edition - Steven F. Daniel (Packt account required)
• Object Oriented Programming using C# - Simon Kendal, Bookboon. (email address requested, not required)
• Threading in C#
• Xamarin.Forms for macOS Succinctly - Alessandro Del Sole
• Xamarin.Forms Succinctly - Alessandro Del Sole

C++

• C++ Annotations - Frank B. Brokken (HTML, PDF)
• C++ Core Guidelines - Editors: Bjarne Stroustrup, Herb Sutter
• C++ GUI Programming With Qt 3 - Jasmin Blanchette, Mark Summerfield (PDF)
• C++ Language
• C++ Notes for Professionals - Compiled from StackOverflow Documentation (PDF)
• C++ Succinctly, Syncfusion (PDF, Kindle) (email address requested, not required)
• C++ Tricks
• CS106X Programming Abstractions in C++
• Elements of Programming - Alexander Stepanov and Paul McJones - (PDF)
• Financial Numerical Recipes in C++ - Bernt Arne Ødegaard
• Game Programming Patterns
• Google's C++ Style Guide
• Hands-On System Programming with C++ - Dr. Rian Quinn (Packt account required)
• How to make an Operating System - Samy Pesse
• How To Think Like a Computer Scientist: C++ Version - Allen B. Downey
• Introduction to Design Patterns in C++ with Qt 4 - Alan Ezust, Paul Ezust (PDF)
• Joint Strike Fighter, C++ Coding Standards, by Bjarne Stroustrup (PDF)
• LearnCpp.com (HTML)
• Matters Computational: Ideas, Algorithms, Source Code, by Jorg Arndt (PDF)
• Open Data Structures (In C++) - Pat Morin (PDF)
• Programming Fundamentals - A Modular Structured Approach using C++ - Kenneth Leroy Busbee (PDF)
• Software Design Using C++ - Br. David Carlson and Br. Isidore Minerd
• Software optimization resources by Agner Fog
• The Boost C++ libraries - Boris Schäling (HTML)
• The Rook's Guide to C++ - Jeremy Hansen (PDF)
• The Ultimate Question of Programming, Refactoring, and Everything
• Think C++: How To Think Like a Computer Scientist - Allen B. Downey (PDF)
• Thinking in C++, Second Edition, Vol. 1. - Bruce Eckel (Vol. 2)

Chapel

• Chapel Tutorial
• Chapel Tutorial for Programmers

Cilk

• Cilk 5.4.6 Reference Manual (PDF)

Clojure

• A Brief Beginner’s Guide To Clojure
• Clojure - Functional Programming for the JVM - R. Mark Volkmann
• Clojure by Example - Hirokuni Kim
• Clojure community-driven documentation
• Clojure Cookbook
• Clojure Distilled Beginner Guide
• Clojure for the Brave and True
• Clojure in Small Pieces - Rich Hickey (PDF)
• Clojure Koans
• Clojure Programming - Wikibooks
• ClojureScript Koans
• ClojureScript Unraveled (HTML)
• Data Sorcery with Clojure
• Modern cljs
• SICP Distilled - An idiosyncratic tour of SICP in Clojure
• The Clojure Style Guide

COBOL

• COBOL Programming Fundamental (PDF)
• Enterprise COBOL for z/OS documentation library
• Introduction to the COBOL Language
• OpenCOBOL 1.1 - Programmer's Guide (PDF)

CoffeeScript

• CoffeeScript Cookbook
• CoffeeScript Ristretto - Reginald Braithwaite (Leanpub account or valid email requested)
• Smooth CoffeeScript
• The Little Book on CoffeeScript

ColdFusion

• CFML In 100 Minutes - J. Casimir
• Learn CF in a Week

Component Pascal

• Computing Fundamentals - Stan Warford (PDF)

Cool

• CoolAid: The Cool 2013 Reference Manual (PDF)

Coq

• Certified Programming with Dependent Types
• Software Foundations

Crystal

• Crystal for Rubyists

CUDA

• CUDA C Best Practices Guide (PDF)
• CUDA C Programming Guide (PDF)
• OpenCL Programming Guide for CUDA Architecture (PDF)

D

• D Templates Tutorial
• Programming in D

Dart

• Learning Dart (PDF)

DB2

• Getting started with DB2 Express-C (PDF)
• Getting started with IBM Data Studio for DB2 (PDF)
• Getting started with IBM DB2 development (PDF)

DBMS

• Database Management Systems eBooks For All Edition (PDF)

Delphi / Pascal

• Essential Pascal Version 1 and 2 - M. Cantù
• Expert Delphi - Paweł Głowacki (Packt account required)

DTrace

• IllumOS Dynamic Tracing Guide

Elasticsearch

• Elasticsearch: The Definitive Guide (fork it on GH)
• Exploring Elasticsearch

Eiffel

• A Functional Pattern System for Object-Oriented Design - Thomas Kuhne (PDF)

Elixir

• 30 Days of Elixir - Tim Morgan (HTML)
• Elixir School (HTML)
• Elixir Succinctly, Syncfusion (PDF, Kindle) (email address requested, not required)
• Getting Started Guide (HTML) (PDF, MOBI, EPUB)
• Joy of Elixir - Ryan Bigg (HTML) - Source (🚧 in process)
• Learning Elixir - Joseph Kain Blog (HTML)
• The Ultimate Guide To Elixir For Object-Oriented Programmers - Bruce Park (HTML)

Ecto

• Ecto Getting Started Guide (HTML)

Phoenix

• Phoenix Framework Guide (HTML)
• Versioned APIs with Phoenix - Elvio Vicosa (PDF)

Emacs

• An Introduction to Programming in Emacs Lisp, 3rd Edition
• Emacs for the Modern World (HTML)
• GNU Emacs Lisp Reference Manual
• GNU Emacs Manual (PDF)

Embedded Systems

• Control and Embedded Systems (HTML)
• Discovering the STM32 Microcontroller (PDF)
• First Steps with Embedded Systems - Byte Craft Limited (PDF)
• Introduction to Embedded Systems, Second Edition - Edward Ashford Lee, Sanjit Arunkumar Seshia (PDF)
• Introduction to Microcontrollers (HTML)

Erlang

• BEAM Wisdoms (HTML)
• Concurrent Programming in ERLANG (PDF)
• Erlang Handbook (PDF)
• Erlang Programming - Wikibooks (HTML)
• Getting Started with Erlang User's Guide (HTML)
• Learn You Some Erlang For Great Good - Frederic Trottier-Hebert
• Making reliable distributed systems in the presence of software errors - Joe Armstrong (PDF)
• Stuff Goes Bad: Erlang in Anger - Fred Herbert (PDF)
• The BEAM Book (HTML)

ESP8266

• Kolban's book on the ESP32 & ESP8266 (Leanpub account or valid email requested)

F Sharp

• Analyzing and Visualizing Data with F# (PDF)
• F# for fun and profit (ePub)
• F# Programming - Wikibooks
• F# Succinctly, SyncFusion (PDF, Kindle) (email address requested, not required)
• Functional Programming Textbook - Yusuf M Motara (PDF)
• Programming Language Concepts for Software Developers

Firefox OS

• Quick Guide For Firefox OS App Development: Creating HTML5 based apps for Firefox OS - Andre Garzia

Flutter

• Cookbook
• Flutter Succinctly, Syncfusion (PDF, Kindle) (email address requested, not required)
• Flutter Tutorial - Tutorials Point
• Flutter Tutorials Handbook

Force.com

• Apex Workbook (PDF)
• Developer Workbooks
• Force.com Fundamentals (PDF)
• Force.com Platform Fundamentals: An Introduction to Custom Application Development in the Cloud
• Force.com Workbook (PDF)
• Heroku Postgres (PDF)
• Heroku Workbook (PDF)
• Integration Workbook (PDF)
• Salesforce1 Mobile App Workbook (PDF)
• Visualforce Workbook (PDF)

Forth

• A Beginner's Guide to Forth - J.V. Noble
• And so Forth... (PDF)
• Programming Forth (PDF)
• Starting Forth
• Thinking Forth
• Thoughtful Programming and Forth

Fortran

• Introduction to fortran 95 and numerical computing: a jump-start for scientists and engineers (PDF)
• Professional Programmer’s Guide to Fortran77 (PDF)
• Self Study Guide: Programming in Fortran 95 (PDF)

FreeBSD

• Books and Articles from FreeBSD Site
• The Complete FreeBSD
• Using C on the UNIX System - David A. Curry

Git

• A Visual Git Reference - Mark Lodato
• Conversational Git
• git - the simple guide
• Git for Computer Scientists
• Git From The Bottom Up - J. Wiegley
• Git Immersion
• Git In The Trenches
• Git internals - Scott Chacon (PDF)
• Git Magic
• Git Notes for Professionals - Compiled from StackOverflow Documentation (PDF)
• Git Pocket Guide - Richard E. Silverman
• Git Reference
• Git Succinctly, Syncfusion (PDF, Kindle) (email address requested, not required)
• Git Workflows
• Happy Git and GitHub for the useR - Jenny Bryan
• How to Collaborate on Github - André J
• Intoduction to Git and Github - Launch School
• Intoduction to Git and Github - Tutorial - Dr. Chris Bourke (PDF)
• Learn Git - Learn Version Control with Git - Tobias Günther
• Pro Git - Scott Chacon
• Pro Git Reedited - Jon Forrest
• Ry's Git Tutorial - Ryan Hodson
• Think Like (a) Git: A Guide for the Perplexed

Go

• An Introduction to Programming in Go
• Build Web Application with Golang
• Building Web Apps with Go
• Effective Go
• Go 101 - @TapirLiu
• Go Bootcamp - Matt Aimonetti
• Go by Example
• Go for Javascript Developers
• How To Code in Go - Mark Bates, Cory Lanou, and Timothy J. Raymond (PDF, EPUB)
• Learn Go with Tests
• Learning Go
• Let's learn Go!
• Practical Cryptography With Go - Kyle Isom
• The Go Tutorial
• The Little Go Book
• Web apps in Go, the anti textbook

Groovy

Gradle

• Building Java Projects with Gradle
• Gradle Succinctly - José Roberto Olivas Mendoza
• Gradle User Guide - Hans Dockter, Adam Murdoch (PDF)

Grails

• Getting Started with Grails
• Grails Tutorial for Beginners
• The Grails Framework - Reference Documentation - Graeme Rocher, Peter Ledbrook, Marc Palmer, Jeff Brown, Luke Daley, Burt Beckwith, Lari Hotari (PDF)

Spock Framework

• Spock Framework Reference Documentation - Peter Niederwieser

Hack

• Hack Documentation

Hadoop

• Big Data Analytics with Hadoop 3 - Sridhar Alla (Packt account required)
• Cloudera Impala - John Russel (PDF)
• Data-Intensive Text Processing with MapReduce (Jimmy Lin and Chris Dyer) (PDF)
• Hadoop for Windows Succinctly - Dave Vickers
• Hadoop Illuminated - Mark Kerzner & Sujee Maniyam

Haskell

• A Gentle Introduction to Haskell
• Anatomy of Programming Languages - William R. Cook
• Beautiful Code, Compelling Evidence - J.R. Heard (PDF)
• Exploring Generic Haskell - Andres Löh (PDF)
• Happy Learn Haskell Tutorial
• Haskell - Wikibooks
• Haskell and Yesod
• Haskell no panic
• Haskell Notes for Professionals - Compiled from StackOverflow documentation (PDF)
• Haskell web Programming (Yesod tutorial)
• Learn Haskell Fast and Hard
• Learn You a Haskell for Great Good - Miran Lipovaca
• Parallel and Concurrent Programming in Haskell - Simon Marlow
• Real World Haskell
• Speeding Through Haskell
• What I Wish I Knew When Learning Haskell - Stephen Diehl (PDF)
• Wise Man's Haskell - Andre Popovitch
• Yet Another Haskell Tutorial (PDF)

Haxe

• Flambe Handbook
• Haxe and JavaScript - Matthijs Kamstra (wikibook)
• Haxe Manual - Haxe Foundation (PDF, HTML)
• HaxeFlixel Handbook (HTML)
• Kha Handbook

HTML / CSS

• A beginner's guide to HTML&CSS
• A free guide to learn HTML and CSS
• Adaptive Web Design - Aaron Gustafson
• An advanced guide to HTML&CSS
• Atomic Design - Brad Frost
• Canvassing
• Code Guide: Standards for developing flexible, durable, and sustainable HTML and CSS - Mark Otto
• CSS Animation 101
• CSS Notes for Professionals - Compiled from StackOverflow Documentation (PDF)
• Dive Into HTML5 - Mark Pilgrim (PDF)
• DOM Enlightenment - Cody Lindley (HTML)
• GA Dash
• Google's HTML/CSS Style Guide
• How to Code in HTML5 and CSS3 - Damian Wielgosik (PDF)
• HTML Canvas Deep Dive - Josh Marinacci
• HTML Dog Tutorials
• HTML5 Canvas - Steve Fulton & Jeff Fulton
• HTML5 for Publishers - Sanders Kleinfeld
• HTML5 For Web Designers - Jeremy Keith
• HTML5 Notes for Professionals - Compiled from StackOverflow documentation (PDF)
• HTML5 Quick Learning Guide - HTML5Templates (PDF)
• HTML5 Shoot 'em Up in an Afternoon - Bryan Bibat (HTML)
• Interneting is Hard (But it Doesn't Have to Be) - Oliver James
• Learn CSS Layout
• Learn CSS Layout the pedantic way
• Learn to Code HTML & CSS - Shay Howe
• Magic of CSS - Adam Schwartz (HTML) (🚧 in process)
• MaintainableCSS
• Pocket Guide to Writing SVG - Joni Trythall
• Pro HTML5 Programming - Jen Simmons, Chris O'Connor, Dylan Wooters, Peter Lubbers
• Resilient Web Design - Jeremy Keith
• Scalable and Modular Architecture for CSS - Jonathan Snook
• Understanding Flexbox: Everything you need to know - Ohans Emmanuel
• W3.CSS Succinctly - Joseph D. Booth
• Web Audio API - Boris Smus
• Web Visual Effects with CSS3 - Thomas Mak

Bootstrap

• Twitter Bootstrap 3 Succinctly - Peter Shaw
• Twitter Bootstrap 4 Succinctly - Peter Shaw
• Twitter Bootstrap Succinctly - Peter Shaw

Idris

• Gentle Introduction to Dependent Types with Idris - Boro Sitnikovski (Leanpub account or valid email requested)

Icon

• The Implementation of the Icon Programming Language

iOS

• Cocoa Dev Central
• iOS 8 App Development Essentials
• iOS Developer Notes for Professionals - Compiled from StackOverflow Documentation (PDF)
• iOS Succinctly, Syncfusion (PDF, Kindle) (email address requested, not required)
• NSHipster (Resource)
• Start Developing iOS Apps (Swift) (HTML)
• Start Developing iOS Apps Today (Objective-C) - Last updated 22.10.2013 (PDF)

IoT

• IoT in five days- V1.1 (PDF, EPUB)
• Mastering Internet of Things - Peter Waher (Packt account required)

Isabelle/HOL

• Concrete Semantics - A Proof Assistant Approach by Tobias Nipkow and Gerwin Klein (PDF)
• Isabelle/HOL - A Proof Assistant for Higher-Order Logic by Tobias Nipkow and Lawrence C. Paulson and Markus Wenzel (PDF)

J

• Arithmetic by Kenneth E Iverson (PDF)
• Brief Reference by Chris Burke and Clifford Reiter (PDF)
• Calculus by Kenneth E Iverson (PDF)
• Computers and Mathematical Notation by Kenneth E Iverson
• Concrete Math Companion by Kenneth E Iverson (PDF)
• Easy J by Linda Alvord, Norman Thomson (PDF) (Word DOC)
• Exploring Math by Kenneth E Iverson (PDF)
• J for C Programmers by Henry Rich
• J Primer
• Learning J by Roger Stokes- online
• Math for the Layman by Kenneth E Iverson (zipped html+images)

Java

• 3D Programming in Java - Daniel Selman (PDF)
• Apache Jakarta Commons: Reusable Java Components - Will Iverson (PDF)
• Artificial Intelligence - Foundations of Computational Agents, Second Edition - David L. Poole and Alan K. Mackworth
• Building Back-End Web Apps with Java, JPA and JSF - Mircea Diaconescu, Gerd Wagner (HTML,PDF)
• Category wise tutorials - J2EE - Yong Mook Kim
• Core Servlets and JavaServer Pages, 2nd Ed. (2003) - Marty Hall and Larry Brown
• Data Structures in Java for the Principled Programmer (2007) - Duane A. Bailey (PDF)
• Google's Java Style Guide
• Introduction to Computer Science "booksite" - by Robert Sedgewick and Kevin Wayne (HTML)
• Introduction to Computer science using Java - Bradley Kjell
• Introduction to Programming in Java - Robert Sedgewick and Kevin Wayne
• Introduction to Programming Using Java - David J. Eck
• Java Application Development on Linux (2005) - Carl Albing and Michael Schwarz (PDF)
• Java, Java, Java Object-Oriented Problem Solving - R. Morelli and R.Walde
• Java Language and Virtual Machine Specifications - James Gosling, et al
• Java Notes for Professionals - Compiled from StackOverflow documentation (PDF)
• Java Programming - Wikibooks
• Java Programming for Kids - Yakov Fain
• Java Projects, Second Edition - Peter Verhas (Packt account required)
• Microservices Best Practices for Java (PDF)
• Object-Oriented Programming in JavaTM Textbook - Rick Halterman (PDF per Chapter)
• Object Oriented Programming using Java - Simon Kendal (PDF) , Bookboon. (email address requested, not required)
• OOP - Learn Object Oriented Thinking & Programming - Rudolf Pecinovsky (PDF)
• Open Data Structures (in Java) - Pat Morin (PDF)
• Playing with Java Microservices on Kubernetes and OpenShift - Nebrass Lamouchi (Leanpub account or valid email requested)
• Processing XML with Java (A Guide to SAX, DOM, JDOM, JAXP, and TrAX) (2002) - Elliotte Rusty Harold
• The ABC of PDF with iText: PDF Syntax essentials - Bruno Lowagie (Leanpub account or valid email requested)
• The Java EE6 Tutorial (PDF)
• The Java EE7 Tutorial - Eric Jendrock, et al (PDF)
• The Java Tutorials
• The Java Web Scraping Handbook - Kevin Sahin (PDF, HTML)
• Think Data Structures: Algorithms and Information Retrieval in Java - Allen B. Downey (PDF, HTML)
• Think Java: How to Think Like a Computer Scientist - Allen B. Downey and Chris Mayfield
• Welcome to Java for Python Programmers - Brad Miller
• Welcome to the Java Workshop (2006) - Trevor Miller
• What’s New in Java 8 - Adam L. Davis

Codename One

• Codename One Developer Guide (PDF)
• Create an Uber Clone in 7 Days (first 2 chapters) - Shai Almog (PDF)

JasperReports

• The JasperReports Ultimate Guide, Third Edition (PDF)

Spring

• Building Applications with Spring 5 and Vue.js 2 - James J. Ye (Packt account required)
• Software Architecture with Spring 5.0 - René Enríquez, Alberto Salazar (Packt account required)
• Spring Framework Cookbook: Hot Recipes for Spring Framework - JCGs (Java Code Geeks) (PDF)
• Spring Framework Notes for Professionals - Compiled from StackOverflow documentation (PDF)
• Spring Framework Reference Documentation - Rod Johnson et al.

Spring Boot

• Building modern Web Apps with Spring Boot and Vaadin (PDF)
• Spring Boot Reference Guide - Phillip Webb et al. (PDF)

Spring Data

• Spring Data Reference - Oliver Gierke, Thomas Darimont, Christoph Strobl, Mark Paluch, Jay Bryant

Spring Security

• Spring Security Reference - Ben Alex, Luke Taylor, Rob Winch

Wicket

• Official Free Online Guide for Apache Wicket framework

JavaScript

• Basic JavaScript for the impatient programmer - Dr. Axel Rauschmayer (HTML)
• Book of Modern Frontend Tooling - Various (HTML)
• Building Front-End Web Apps with Plain JavaScript - Gerd Wagner (HTML,PDF)
• Clean Code JavaScript - Ryan McDermott (HTML)
• Crockford's JavaScript - Douglas Crockford (HTML)
• Deep JavaScript: Theory and techniques - Dr. Axel Rauschmayer (HTML)
• Designing Scalable JavaScript Applications - Emmit Scott (PDF+livebook)
• Dev Docs - Various (HTML)
• Eloquent JavaScript 3rd edition - Marijn Haverbeke (HTML, PDF, EPUB, MOBI)
• Exploring ES6 - Dr. Axel Rauschmayer (HTML)
• Google JavaScript Style Guide - Aaron Whyte, Bob Jervis, Dan Pupius, Erik Arvidsson, Fritz Schneider, & Robby Walker (HTML)
• Human JavaScript - Henrik Joreteg (HTML)
• JavaScript Allongé - Reginald Braithwaite (HTML)
• JavaScript Bible - Danny Goodman (PDF)
• JavaScript Challenges Book - Tomás Corral Casas (HTML)
• JavaScript Enlightenment - Cody Lindley (HTML)
• JavaScript ES6 and beyond - Alberto Montalesi (PDF, epub)
• JavaScript For Cats - Maxwell Ogden (HTML)
• JavaScript for Impatient Programmers (ES2020 edition) - Dr. Axel Rauschmayer (HTML)
• JavaScript Fundamentals, Plus a Dash Of JQuery - for dinner ladies - Nicholas Johnson (HTML)
• JavaScript Garden Maintained by Tim Ruffles (HTML)
• JavaScript Notes for Professionals - Compiled from StackOverflow documentation (PDF)
• JavaScript Patterns Collection - Shi Chuan (HTML)
• JavaScript Spessore - Reginald Braithwaite (HTML)
• JavaScript Succinctly - Cody Lindley (PDF, Kindle; email address requested, not required)
• JavaScript the Right Way - William Oliveira & Allan Esquina (HTML)
• jQuery Fundamentals - Bocoup (HTML)
• JS Robots - Mark Daggett (PDF)
• Leaflet Tips and Tricks: Interactive Maps Made Easy - Malcolm Maclean (HTML)
• Learning JavaScript Design Patterns - Addy Osmani (HTML)
• Let's Learn ES6 - Ryan Christiani (Superbook format)
• Managing Space and Time with JavaScript - Book 1: The Basics - Noel Rappin (dead link)
• Marionette Exposé: Learn to write modular Javascript applications using Backbone Marionette and RequireJS/AMD - Jack Killilea (HTML, PDF, EPUB, MOBI; Leanpub account or valid email requested)
• Mozilla Developer Network's JavaScript Guide - Mozilla Developer Network contributors (HTML)
• Neural Networks with JavaScript Succinctly - James McCaffrey (PDF, EPUB, MOBI)
• Oh My JS - Azat Mardanov (HTML)
• Patterns For Large-Scale JavaScript Application Architecture - Addy Osmani (HTML)
• Practical Modern JavaScript - Nicolas Bevacqua (HTML)
• Professor Frisby’s Mostly Adequate Guide to Functional Programming - Brian Lonsdorf (HTML)
• Robust Client-Side JavaScript - Matthias Schäfer (HTML, EPUB)
• Single page apps in depth - Mixu (HTML)
• Speaking JavaScript - Dr. Axel Rauschmayer
• Standard ECMA-262 ECMAScript 2016 Language Specification - Ecma International (HTML,PDF)
• The JavaScript Tutorial - Ilya Kantor (HTML)
• The JavaScript Way - Baptiste Pesquet
• The Problem with Native JavaScript APIs - Nicholas C. Zakas (PDF, email address requested)
• Thinking in JavaScript - Aravind Shenoy (Kindle)
• Understanding ECMAScript 6 - Nicholas C. Zakas (HTML)
• Understanding JavaScript OOP - Quil (HTML)
• You Don't Know JS - Kyle Simpson (HTML, PDF, EPUB, MOBI)

Angular.js

• Angular for the jQuery developer
• Angular.js Guide
• Angular.js Material Designing
• Angular.js Style Guide
• Angular.js Tutorial
• AngularJS - Step by Logical Step
• AngularJS Notes for Professionals - Compiled from StackOverflow Documentation (PDF)
• AngularJS Succinctly (PDF, Kindle) (email address requested, not required)
• AngularJs vs EmberJs
• Seven-Part Introduction to Angular
• Unit Testing Best Practices in AngularJS

Aurelia

• Beginning Aurelia - behzad (Leanpub account or valid email requested)

Backbone.js

• A pragmatic guide to Backbone.js apps
• Backbone Tutorials: Beginner, Intermediate and Advanced - Thomas Davis (Leanpub account or valid email requested)
• Backbonejs Tutorials
• Building Single Page Web Apps with Backbone.js (🚧 in process)
• Developing Backbone.js Applications
• Getting Started with Backbone.js
• How to share Backbone.js models with node.js

Booty5.js

• The Booty5 HTML5 Game Maker Manual

D3.js

• D3 Tips and Tricks - Malcolm Maclean
• Dashing D3.js Tutorial
• Interactive Data Visualization with D3

Dojo

• Dojo: The Definitive Guide - Matthew A. Russell

Elm

• An Introduction to Elm (HTML)
• Beginning Elm - Pawan Poudel (HTML)
• Building a Live-Validating Signup Form in Elm
• Elm Accelerated - James Porter
• Elm Programming Language (HTML)
• Elm Tutorial
• Learn You an Elm (HTML)
• The Elm Architecture

Ember.js

• AngularJs vs EmberJs
• DockYard Ember.js Style Guide
• Ember App with RailsApi
• Ember.js - Getting started
• Vic Ramon's Ember Tutorial

Express.js

• Express.js Guide - Azat Mardanov

Ionic

• Ionic 4 Succinctly - Ed Freitas

jQuery

• JavaScript Fundamentals, Plus a Dash Of JQuery - for dinner ladies
• jQuery Notes for Professionals - Compiled from StackOverflow Documentation (PDF)
• jQuery Novice to Ninja (PDF)
• jQuery Succinctly, Syncfusion (PDF, Kindle) (email address requested, not required)

Meteor

• Your First Meteor Application, A Complete Beginner’s Guide to the Meteor JavaScript Framework

Node.js

• An Introduction to libuv - Nikhil Marathe (PDF - ePub)
• Full Stack JavaScript: Learn Backbone.js, Node.js and MongoDB - Azat Mardan
• Mixu's Node Book
• Node Documentation
• Node: Up and Running - Tom Hughes-Croucher
• Node.js Notes for Professionals - Compiled from StackOverflow Documentation (PDF)
• Node.js Succinctly, Syncfusion (PDF, Kindle) (email address requested, not required)
• Practical Node.js: Building Real-World Scalable Web Apps - Azat Mardan
• The Node Beginner Book

Om

• Om Tutorial

React

• Free React on Rails course
• Full-Stack React Projects - Shama Hoque (Packt account required)
• Hacking with React
• Intro to the React Framework
• Learning React.js: Getting Started and Concepts
• React-Bits
• React Enlightenment
• React In-depth: An exploration of UI development
• React JS Notes for Professionals - Compiled from StackOverflow Documentation (PDF)
• React Primer Draft
• React Succinctly - Samer Buna
• React Tutorial
• React Tutorial by Josh Finnie
  • Part 1
  • Part 2
  • Part 3
• React with ASP.NET Core Tutorial
• React.js Tutorial: Now is Your Time to Try It, Right in Your Browser
• SurviveJS - Webpack and React

React Native

• Programming React Native (Leanpub account or valid email requested)
• React Native Animation Book
• React Native Express
• React Native Notes for Professionals - Compiled from StackOverflow documentation (PDF)
• React Native Training

Redux

• Full-Stack Redux Tutorial
• SoundCloud Application in React + Redux
• The Complete Redux Book - Boris Dinkevich and Ilya Gelman (Leanpub account or valid email requested)

Vue.js

• Learning Vue.js (PDF)
• The Vue.js Handbook - Flavio Copes (PDF)

Jenkins

• Jenkins: The Definitive Guide (PDF)

Julia

• Introducing Julia - Wikibooks
• Julia by Example - Samuel Colvin (GitHub repo)
• Julia language: a concise tutorial - Antonello Lobianco (GitBook)
• Learn Julia in Y minutes - Leah Hanson
• Quantitative Economics with Julia - Jesse Perla, Thomas J. Sargent and John Stachurski (PDF)
• The Julia Express - Bogumił Kamiński (PDF)
• Think Julia - Ben Lauwens and Allen Downey (GitBook)

Kotlin

• Kotlin Notes for Professionals - Compiled from StackOverflow documentation (PDF)
• Kotlin Official Documentation

LaTeX / TeX

LaTeX

• Arbitrary LaTex Reference
• Begin Latex in minutes
• LaTeX - Wikibooks
• The Not So Short Introduction to LaTeX (PDF)

TeX

• Notes On Programming in TeX - Christian Feursänger (PDF)
• TeX by Topic, A TeXnician's Reference - Victor Eijkhout
• TeX for the Impatient - Paul Abrahams, Kathryn Hargreaves, and Karl Berry

Limbo

• Inferno Programming With Limbo

Linux

• Ad Hoc Data Analysis From The Unix Command Line - Wikibooks
• Advanced Linux Programming (PDF)
• Automated Linux From Scratch
• Getting Started with Ubuntu
• GNU Autoconf, Automake and Libtool
• GTK+/Gnome Application Development
• Hardened Linux From Scratch
• Kali Linux 2018: Assuring Security by Penetration Testing, Fourth Edition - Shiva V. N Parasram, Alex Samm, Damian Boodoo, Gerard Johansen, Lee Allen, Tedi Heriyanto, Shakeel Ali (Packt account required)
• Kali Linux: Professional Penetration-Testing Distribution
• Learning Debian GNU/Linux
• Linux 101 Hacks - Ramesh Natarajan (PDF)
• Linux Administrator's Security Guide
• Linux Advanced Routing & Traffic Control HOWTO
• Linux Appliance Design: A Hands-On Guide to Building Linux Appliances - Bob Smith, John Hardin, Graham Phillips, Bill Pierce (PDF, EPUB, MOBI)
• Linux commands Notes for Professionals - Compiled from StackOverflow documentation (PDF)
• Linux Device Drivers, Third Edition - Jonathan Corbet, Alessandro Rubini, and Greg Kroah-Hartman
• Linux from Scratch
• Linux Fundamentals - Paul Cobbaut (PDF)
• Linux Inside
• Linux Kernel in a Nutshell
• Linux Newbie Administrator Guide
• Linux Security for Beginners
• Linux Succinctly, Syncfusion (PDF, Kindle) (email address requested, not required)
• Red Hat Enterprise Linux 6 Essentials
• Secure Programming HOWTO - Creating Secure Software - D. A. Wheeler (HTML, PDF)
• Ten Steps to Linux Survival: Bash for Windows People - Jim Lehmer
• The Debian Administrator's Handbook
• The Linux Command Line (PDF)
• The Linux Development Platform (PDF)
• The Linux Kernel Module Programming Guide
• The Linux System Administrator's Guide
• Ubuntu Pocket Guide and Reference
• Ubuntu Server Guide (PDF)
• Understanding the Linux Virtual Memory Manager - Mel Gorman (HTML, PDF)
• UNIX Systems Programming for SVR4 - David A. Curry
• Upstart Intro, Cookbook and Best Practises
• What Every Programmer Should Know About Memory (PDF)

Lisp

• Basic Lisp Techniques - David J. Cooper, Jr. (PDF)
• Casting Spels in Lisp
• Common Lisp: A Gentle Introduction to Symbolic Computation - David S. Touretzky (PDF, PS)
• Common Lisp: An Interactive Approach - Stuart C. Shapiro
• Common Lisp Quick Reference
• Common Lisp the Language, 2nd Edition
• Google's Common Lisp Style Guide
• Interpreting LISP - Gary D. Knott (PDF)
• Learn Lisp The Hard Way - Colin J.E. Lupton
• Let Over Lambda - 50 Years of Lisp - D. Hoyte
• Lisp Hackers: Interviews with 100x More Productive Programmers - Vsevolod Dyomkin
• Lisp Koans
• Lisp Web Tales - Pavel Penev (Leanpub account or valid email requested)
• On Lisp - P. Graham
• Paradigms of Artificial Intelligence Programming: Case Studies in Common Lisp - Peter Norvig (PDF, epub, markdown)
• Practical Common Lisp - P. Seibel
• The Common Lisp Cookbook
• The Evolution of Lisp - Guy L. Steele Jr., Richard P. Gabriel (PDF)

Livecode

• LiveCode userguide (PDF)

Lua

• Lua 5.3 Reference Manual
• Lua Programming - Wikibooks
• Programming in Lua (first edition)

Make

• Managing Projects with GNU Make - Robert Mecklenburg

Markdown

• Learn Markdown - Sammy P., Aaron O. (PDF) (EPUB) (MOBI)

Mathematica

• Mathematica® programming: an advanced introduction by Leonid Shifrin
• Power Programming with Mathematica - David B. Wagner
• Stephen Wolfram's The Mathematica Book
• Vector Math for 3d Computer Graphics
• Wolfram Mathematica Product Training: Wolfram U

MATLAB

• An Interactive Introduction to MATLAB (PDF)
• An Introduction to MATLAB (PDF)
• Applications of MATLAB in Science and Engineering
• Experiments with MATLAB
• Freshman Engineering Problem Solving with MATLAB (PDF)
• Interactive Tutorials for MATLAB, Simulink, Signal Processing, Controls, and Computational Mathematics
• Introduction to MATLAB for Engineering Students - David Houcque (PDF) (1.2, 2005)
• MATLAB - A Fundamental Tool for Scientific Computing and Engineering Applications - Volume 1
• MATLAB - A Ubiquitous Tool for the Practical Engineer
• MATLAB for Engineers: Applications in Control, Electrical Engineering, IT and Robotics
• MATLAB Notes for professionals - Compiled from StackOverflow documentation (PDF)
• MATLAB Programming - Wikibooks
• MATLAB Succinctly, Syncfusion (PDF, Kindle) (email address requested, not required)
• Numerical Computing with MATLAB
• Physical Modeling in MATLAB - Alan B. Downey
• Scientific Computing - Jeffrey R. Chasnov (PDF)

Maven

• Developing with Eclipse and Maven
• Maven by Example
• Maven: The Complete Reference
• Repository Management with Nexus

Mercurial

• HGInit - Mercurial Tutorial - Joel Spolsky
• Mercurial: The Definitive Guide
• Mercurial: The Definitive Guide 2nd edition

Mercury

• The Mercury Users' Guide (PDF)

Modelica

• Modelica by Example

MySQL

• MySQL 8.0 Tutorial Excerpt (HTML) (PDF)
• MySQL Essentials
• MySQL Notes for Professionals - Compiled from StackOverflow Documentation (PDF)

Neo4J

• Fullstack GraphQL Applications with GRANDStack – Essential Excerpts - William Lyon (PDF) (email requested)
• Graph Algorithms: Practical Examples in Apache Spark and Neo4j - Mark Needham and Amy E. Hodler (PDF, EPUB, MOBI) (email requested)
• Graph Databases 2nd edition - Ian Robinson, Jim Webber and Emil Eifrém (PDF, EPUB, MOBI) (email requested)
• Graph Databases For Dummies - Dr. Jim Webber and Rik Van Bruggen (PDF) (email requested)

.NET Framework

• Akka.NET Succinctly - Zoran Maksimovic
• Application Security in .NET Succinctly - Stan Drapkin
• Clean Code .NET
• Cryptography in .NET Succinctly - Dirk Strauss
• Entity Framework
• Entity Framework Core Succinctly - Ricardo Peres
• Game Creation with XNA - Wikibooks
• Getting the Most from LINQPad Succinctly - José Roberto Olivas Mendoza
• MonoGame Succinctly - Jim Perry
• .NET for Visual FoxPro Developers
• .NET Framework Notes for Professionals - Compiled from StackOverflow Documentation (PDF)
• .NET Performance Testing and Optimization - The Complete Guide - Paul Glavich, Chris Farrell (PDF)
• NuGet In-House Succinctly - José Roberto Olivas Mendoza
• Rider Succinctly - Dmitri Nesteruk
• Under the Hood of .NET Memory Management - Chris Farrell, Nick Harrison (PDF)
• Using .NET Core, Docker, and Kubernetes Succinctly - Michele Aponte
• Visual Studio .NET Tips and Tricks (VS 2003-2005 only)
• Visual Studio 2019 Succinctly - Alessandro Del Sole

Nim

• Nim Basics - narimiran
• Nim by Example - Flaviu Tamas
• Nim Days - Ahmed Thabet

NoSQL

• CouchDB: The Definitive Guide
• Extracting Data from NoSQL Databases: A Step towards Interactive Visual Analysis of NoSQL Data - Petter Nasholm (PDF)
• Graph Databases
• Introduction to MongoDB - Tutorials Point
• MongoDB Koans
• MongoDB Succinctly, Syncfusion (PDF, Kindle) (email address requested, not required)
• NoSQL Databases - Christof Strauch (PDF)
• The Little MongoDB Book
• The Little Redis Book - K. Seguin (PDF, Epub)

Oberon

• Algorithms and Data-Structures - Niklaus Wirth (PDF)
• Object-Oriented Programming in Oberon-2 - Hanspeter Mössenböck (PDF)
• Programming in Oberon - Niklaus Wirth (PDF)

Objective-C

• Google's Objective-C Style Guide
• Object-Oriented Programming with Objective-C
• Objective-C Notes for Professionals - Compiled from StackOverflow Documentation (PDF)
• Objective-C Succinctly, Syncfusion (PDF, Kindle) (email address requested, not required)
• Programming With Objective-C

OCaml

• Developing Applications With Objective Caml
• Functional Programming in OCaml - Michael R. Clarkson
• OCaml Scientific Computing - Liang Wang, Jianxin Zhao (HTML) (🚧 in process)
• Real World OCaml
• Think OCaml - Allen B. Downey and Nicholas Monje
• Unix System Programming in OCaml Github Repo
• Using, Understanding, and Unraveling The OCaml Language: From Practice to Theory and vice versa - Didier Rémy

Octave

• Octave Programming - Wikibooks

OpenMP

• A Guide To OpenMP
• OpenMP Application Programming Interface Standard Version 4.0 (PDF)
• OpenMP Application Programming Interface Standard Version 5.0 (PDF)

OpenResty

• Programming OpenResty

OpenSCAD

• OpenSCAD User Manual - Wikibooks

TrueOS

• TrueOS® Users Handbook

Perl

• Beginning Perl
• Data Munging with Perl (PDF)
• Embedding Perl in HTML with Mason - D. Rolsky, K. Williams
• Essential Perl (PDF)
• Exploring Programming Language Architecture in Perl
• Extreme Perl - R. Nagier (HTML, PDF)
• Higher-Order Perl - M. J. Dominus (PDF)
• Impatient Perl
• Learning Perl The Hard Way
• Modern Perl 5
• Perl & LWP
• Perl 5 Internals
• Perl for the Web - C. Radcliff
• Perl Notes for Professionals - Compiled from StackOverflow Documentation (PDF)
• Perl Training Australia - Course Notes
• Plack Handbook
• SDL::Manual Writing Games in Perl
• Template Toolkit Documentation
• The DBIx-Class Book
• The PDL Book (PDF)
• Web Client Programming with Perl

PHP

• Clean Code PHP
• PHP 5 Power Programming (PDF)
• PHP Best Practices
• PHP Internals Book
• PHP Notes for Professionals - Compiled from StackOverflow Documentation (PDF)
• PHP Pandas - Dayle Rees
• PHP Programming - Wikibooks
• PHP Reference: Beginner to Intermediate PHP5 - Mario Lurig (PDF)
• PHP Security Guide
• PHP: The Right Way
• PHPUnit Manual - Sebastian Bergmann (PDF)
• Practical PHP Programming
• Practical PHP Testing
• Survive The Deep End: PHP Security
• Using Libsodium in PHP Projects

CakePHP

• CakePHP Cookbook 2.x (PDF)

CodeIgniter

• CodeIgniter 3 User Guide
• CodeIgniter 4 User Guide

Drupal

• The Tiny Book of Rules (PDF)

Laravel

• 100 (and counting) Laravel Quick Tips - Povilas Korop / LaravelDaily Team (PDF)
• Laravel 5.x Official Documentation. Synced Daily (Leanpub account or valid email requested)
• Laravel Best Practices
• Laravel: Code Bright - Dayle Rees
• Laravel: Code Happy - Dayle Rees
• Laravel: Code Smart - Dayle Rees
• Laravel Collections Unraveled - Jeffrey Madsen (Leanpub account or valid email requested)

Symfony

• Symfony 5: The Fast Track
• The Symfony Best practices 4.1.x (PDF)
• The Symfony Book 2.8.x
• The Symfony Book 3.4.x
• The Symfony Book 4.4.x

Zend

• Using Zend Framework 3

PicoLisp

• PicoLisp by Example
• PicoLisp Works

PostgreSQL

• Postgres Official Documentation
• Postgres Succinctly (PDF, Kindle) (email address requested, not required)
• PostgreSQL Tutorial - Tutorials Point
• Practical PostgreSQL
• The Internals of PostgreSQL for database administrators and system developers

PowerShell

• A Unix Person's Guide to PowerShell - The DevOps Collective, Inc. (PDF, ePub, MOBI, HTML) (Leanpub account or valid email requested)
• Creating HTML Reports in PowerShell - The DevOps Collective, Inc. (PDF, ePub, MOBI, HTML) (Leanpub account or valid email requested)
• DevOps: The Ops Perspective - The DevOps Collective, Inc. (PDF, ePub, MOBI, HTML) (Leanpub account or valid email requested)
• Ditch Excel: Making Historical & Trend Reports in PowerShell - The DevOps Collective, Inc. (PDF, ePub, MOBI, HTML) (Leanpub account or valid email requested)
• Layman’s Guide to PowerShell 2.0 remoting (PDF)
• Learn PowerShell Core 6.0 - David das Neves, Jan-Hendrik Peters (Packt account required)
• Learn PowerShell in Y Minutes
• Mastering PowerShell v2
• PowerShell 101: The No-Nonsense Beginner’s Guide to PowerShell - Mike F. Robbins (Leanpub account or valid email requested)
• PowerShell 2.0 – One CMDLET At A Time (PDF)
• PowerShell Notes for Professionals - Compiled from StackOverflow documentation (PDF)
• PowerShell Succinctly, Syncfusion (PDF, Kindle) (email address requested, not required)
• PowerShell Tips to Write By - Adam Bertram (Leanpub account or valid email requested) (🚧 in process)
• Secrets of PowerShell Remoting - The DevOps Collective, Inc. (PDF, ePub, MOBI, HTML) (Leanpub account or valid email requested)
• The Big Book of PowerShell Error Handling - The DevOps Collective, Inc. (PDF, ePub, MOBI, HTML) (Leanpub account or valid email requested)
• The Big Book of PowerShell Gotchas - The DevOps Collective, Inc. (PDF, ePub, MOBI, HTML) (Leanpub account or valid email requested)
• The Monad Manifesto - Annotated - The DevOps Collective, Inc. (PDF, ePub, MOBI, HTML) (Leanpub account or valid email requested)
• The PowerShell + DevOps Global Summit Manual for Summiteers - The DevOps Collective, Inc. (PDF, ePub, MOBI, HTML) (Leanpub account or valid email requested)
• Why PowerShell? - The DevOps Collective, Inc. (PDF, ePub, MOBI, HTML) (Leanpub account or valid email requested)
• Windows PowerShell Networking Guide - The DevOps Collective, Inc. (PDF, ePub, MOBI, HTML) (Leanpub account or valid email requested)

Processing

• The Nature of Code: Simulating Natural Systems with Processing

Prolog

• Adventure in Prolog
• Applications of Prolog - Attila Csenki, Bookboon. (email address requested, not required)
• Coding Guidelines for Prolog - Michael A. Covington, Roberto Bagnara, Richard A. O'Keefe, Jan Wielemaker, Simon Price
• Concise Intro to Prolog
• Expert Systems in Prolog
• GNU Prolog Manual (PDF)
• Introduction to Prolog for Mathematicians - J. Ireson-Ireson-Paine
• Learn Prolog Now!
• Logic, Programming and Prolog (2ed)
• Natural Language Processing Techniques in Prolog - P. Blackburn, K. Striegnitz
• Prolog and Natural - Language Analysis - Fernando C. N. Pereira, Stuart M. Shieber
• Prolog for Programmers
• Prolog Problems - Werner Hett
• Prolog Techniques - Attila Csenki, Bookboon. (email address requested, not required)
• Prolog Tutorial
• The Art of Prolog, Second Edition - Leon S. Sterling, Ehud Y. Shapiro (Open Access)
• The First 10 Prolog Programming Contests - Bart Demoen, Phuong-Lan Nguyen, Tom Schrijvers, Remko Tronçon
• Warren's Abstract Machine: A Tutorial Reconstruction - Hassan A¨it-Kaci

Constraint Logic Programming (extended Prolog)

• A Gentle Guide to Constraint Logic Programming via ECLiPSe

PureScript

• PureScript By Example - Phil Freeman

Python

• 20 Python Libraries You Aren't Using (But Should) - Caleb Hattingh
• A Beginner's Python Tutorial - Wikibooks
• A Byte of Python (3.x) (HTML, PDF, EPUB, Mobi)
• A Guide to Python's Magic Methods - Rafe Kettler
• A Whirlwind Tour of Python - Jake VanderPlas (PDF) (EPUB, MOBI)
• Automate the Boring Stuff - Al Sweigart
• Beej's Guide to Python Programming - For Beginners - B. Hall (HTML,PDF)
• Biopython (PDF)
• Build applications in Python the antitextbook (3.x) (HTML, PDF, EPUB, Mobi)
• Building Skills in Object-Oriented Design (Python) - Steven F. Lott (PDF) (2.1.1)
• Building Skills in Python - Steven F. Lott (PDF) (2.6)
• Code Like a Pythonista: Idiomatic Python - David Goodger
• CodeCademy Python
• Composing Programs (3.x)
• Cracking Codes with Python - Al Sweigart
• Data Structures and Algorithms in Python - B. R. Preiss (PDF)
• Dive into Python 3 - Mark Pilgrim (3.0)
  • Dive into Python - Mark Pilgrim (2.3)
• From Python to NumPy
• Full Stack Python
• Functional Programming in Python - David Mertz
• Fundamentals of Python Programming - Richard L. Halterman (PDF) (🚧 in process)
• Google's Python Class (2.4 - 2.x)
• Google's Python Style Guide
• Hadoop with Python - Zachary Radtka, Donald Miner
• Hands-On Natural Language Processing with Python - Rajesh Arumugam, Rajalingappaa Shanmugamani (Packt account required)
• Hitchhiker's Guide to Python! (2.6)
• How to Code in Python 3 - Lisa Tagliaferri (PDF)
• How to Make Mistakes in Python - Mike Pirnat (PDF) (1st edition)
• How to Think Like a Computer Scientist: Learning with Python, Interactive Edition (3.2)
  • How to Think Like a Computer Scientist: Learning with Python - Allen B. Downey, Jeff Elkner and Chris Meyers (2.4)
  • Think Python 2e - Allen B. Downey (2.x & 3.0)
• Intermediate Python - Muhammad Yasoob Ullah Khalid (1st edition)
• Introduction to Programming with Python (3.3)
  • Introduction to Programming Using Python - Cody Jackson (1st edition) (2.3)
• Introduction to Python - Kracekumar (2.7.3)
• Invent Your Own Computer Games With Python - Al Sweigart (3.1)
• Learn Python, Break Python
• Learn Python Programming, Second Edition - Fabrizio Romano (Packt account required)
• Learn to Program Using Python - Cody Jackson (PDF)
• Learning to Program
• Lectures on scientific computing with python - J.R. Johansson (2.7)
• Making Games with Python & Pygame - Al Sweigart (2.7)
• Math for programmers (using python)
• Modeling and Simulation in Python - Allen B. Downey (PDF)
• Modeling Creativity: Case Studies in Python - Tom D. De Smedt (PDF)
• Natural Language Processing (NLP) with Python — Tutorial (PDF)
• Natural Language Processing with Python (3.x)
• Non-Programmer's Tutorial for Python 3 - Wikibooks (3.3)
  • Non-Programmer's Tutorial for Python 2.6 - Wikibooks (2.6)
• Picking a Python Version: A Manifesto - David Mertz
• Porting to Python 3: An In-Depth Guide (2.6 - 2.x & 3.1 - 3.x)
• Practical Programming in Python - Jeffrey Elkner (PDF)
• Problem Solving with Algorithms and Data Structures using Python - Bradley N. Miller and David L. Ranum (3.x)
• Program Arcade Games With Python And Pygame (3.3)
• Programming Computer Vision with Python (PDF)
• Python 101 - Michael Driscoll (HTML, TEXT)
• Python 2 Official Documentation (PDF, HTML, TEXT) (2.x)
• Python 2.7 quick reference - John W. Shipman (PDF) (2.7)
• Python 3 Official Documentation (PDF, EPUB, HTML, TEXT) (3.x)
• Python 3 Tutorial
• Python Data Science Handbook - Jake VanderPlas (HTML, Jupyter Notebooks)
• Python for Everybody - Charles Russell Severance (PDF, EPUB, HTML) (3.x)
• Python for Informatics: Exploring Information - Charles Russell Severance (2.7.5)
• Python for you and me (2.7.3)
• Python for you and me (3.x)
• Python Idioms (PDF)
• Python in Education - Nicholas Tollervey
• Python in Hydrology - Sat Kumar Tomer
• Python Koans (2.7 or 3.x)
• Python Machine Learning By Example - Yuxi (Hayden) Liu (Packt account required)
• Python Module of the Week (3.x)
  • Python Module of the Week (2.x)
• Python Notes for Professionals - Compiled from StackOverflow documentation (PDF)
• Python Practice Book (2.7.1)
• Python Practice Projects
• Python Programming - Wikibooks (2.7)
• Python Programming - Wikibooks (PDF) (2.6)
• Python Tutorial - Tutorials Point
• Scipy Lecture Notes
• SICP in Python (3.2)
• Slither into Python: An introduction to Python for beginners (3.7)
• Suporting Python 3: An In-Depth Guide (2.6 - 2.x & 3.1 - 3.x)
• Test-Driven Web Development with Python - Harry Percival (3.3 - 3.x)
• Text Processing in Python - David Mertz (2.3 - 2.x)
• The Coder's Apprentice: Learning Programming with Python 3 - Pieter Spronck (PDF) (3.x)
• The Definitive Guide to Jython, Python for the Java Platform - Josh Juneau, Jim Baker, Victor Ng, Leo Soto, Frank Wierzbicki (2.5)
• The Little Book of Python Anti-Patterns (Source)
• The Programming Historian - William J. Turkel, Adam Crymble and Alan MacEachern
• The Python GTK+ 3 Tutorial
• The Standard Python Library - Fredrik Lundh
• Think Complexity - Allen B. Downey (2nd Edition) (PDF, HTML)
• Think DSP - Digital Signal Processing in Python - Allen B. Downey (PDF, HTML)
• Tiny Python 3.6 Notebook - Matt Harrison (3.6)
• Web2py: Complete Reference Manual, 6th Edition (pre-release) (2.5 - 2.x)

Django

• Django Girls Tutorial (1.11)
• Django Official Documentation (PDF) (1.5)
• Django Official Documentation (PDF) (1.7)
• Django Official Documentation (PDF) (1.9)
• Django Official Documentation (PDF) (1.10)
• Django Official Documentation (PDF) (2.2)
• Django Official Documentation (PDF) (3.1)
• Django RESTful Web Services - Gaston C. Hillar (Packt account required)
• Django Web Framework (Python) - MDN contributors
• Djen of Django
• Effective Django (1.5)
• How to Tango With Django (1.7)

Flask

• Explore Flask - Robert Picard
• Flask Documentation - Pallets
• The Flask Mega-Tutorial - Miguel Grinberg (0.9)

Kivy

• Kivy Programming Guide

Pandas

• Learn Pandas - Hernan Rojas (0.18.1)
• pandas: powerful Python data analysis toolkit - Wes McKinney and the Pandas Development Team (🚧 in process) (PDF)

Pyramid

• Quick Tutorial for Pyramid

Tornado

• Learn Web Programming

QML

• Qt5 Cadaques - Juergen Bocklage-Ryannel and Johan Thelin (HTML, PDF, ePub) (🚧 in process)

R

• Advanced R Programming - Hadley Wickham
• An Introduction to Statistical Learning with Applications in R - Gareth James, Daniela Witten, Trevor Hastie and Robert Tibshirani (PDF)
• Cookbook for R - Winston Chang
• Data Analysis and Prediction Algorithms with R - Rafael A. Irizarry
• Data Analysis for the Life Sciences - Rafael A Irizarry, Michael I Love (Leanpub account or valid email requested)
• Efficient R programming - Colin Gillespie, Robin Lovelace
• Exploratory Data Analysis with R - Roger D. Peng (Leanpub account or valid email requested)
• Introduction to Probability and Statistics Using R - G. Jay Kerns (PDF)
• Learning Statistics with R - Danielle Navarro
• ModernDive - Chester Ismay and Albert Y. Kim
• Practical Regression and Anova using R - Julian J. Faraway (PDF)
• R for Data Science - Garrett Grolemund and Hadley Wickham
• R for Spatial Analysis (PDF)
• R Language for Programmers - John D. Cook
• R Notes for Professionals - Compiled from StackOverflow Documentation (PDF)
• R Packages - Hadley Wickham
• R Practicals (PDF)
• R Programming - Wikibooks
• R Programming for Data Science - Roger D. Peng (Leanpub account or valid email requested)
• R Succinctly, Syncfusion (PDF, Kindle) (email address requested, not required)
• Summary and Analysis of Extension Program Evaluation in R - Salvatore S. Mangiafico
• The caret Package - Max Kuhn
• The R Inferno - Patrick Burns (PDF)
• The R Language
• The R Manuals
• Tidy Text Mining with R - Julia Silge and David Robinson

Racket

• How to Design Programs - Matthias Felleisen, Robert Bruce Findler, Matthew Flatt, Shriram Krishnamurthi
• Programming Languages: Application and Interpretation
• The Racket Guide

Raku

• Metagenomics - Ken Youens-Clark
• Perl 6 at a Glance - Andrew Shitov (PDF)
• Raku Guide (HTML) (PDF)
• Raku One-Liners - Andrew Shitov (PDF)
• Raku Programming - Wikibooks (HTML)
• Think Raku - Laurent Rosenfeld, with Allen B. Downey (PDF)
• Using Perl 6 (🚧 project is dead)
• X=Raku - Learn X in Y minutes (HTML)

Raspberry Pi

• Raspberry Pi: Measure, Record, Explore - Malcolm Maclean (HTML)
• Raspberry Pi Users Guide - (2012) - Eben Upton (PDF)
• The Official Raspberry Pi Project Book (PDF)

REBOL

• Learn REBOL - Nick Antonaccio

Ruby

• A community-driven Ruby style guide
• CodeCademy Ruby
• Developing Games With Ruby - Tomas Varaneckas
• I Love Ruby
• Introduction to Programming with Ruby - Launch School
• Just Enough Ruby to Get By
• Learn Ruby First - Frederick John
• Learn to Program - Chris Pine
• Mr. Neighborly's Humble Little Ruby Book
• Object Oriented Programming with Ruby - Launch School
• Practicing Ruby
• Programming Ruby
• Ruby Best Practices - Gregory Brown (PDF)
• Ruby Essentials
• Ruby Hacking Guide
• Ruby in Twenty Minutes
• Ruby Koans
• Ruby Learning
• Ruby Notes for Professionals - Compiled from StackOverflow Documentation (PDF)
• Ruby Programming
• Ruby User's Guide
• Ruby Web Dev: The Other Way - Yevhen Kuzminov
• Rubyfu
• The Bastards Book of Ruby
• The Book Of Ruby - Huw Collingbourne
• The Definitive Ruby Tutorial For Complete Beginners - Jesus Castello
• The Little Book Of Ruby - Huw Collingbourne
• The Ruby Reference - Victor Shepelev
• The Unofficial Ruby Usage Guide (at Google) - Ian Macdonald
• Using Blocks in Ruby - Jay McGavren (PDF)
• Why's (Poignant) Guide to Ruby

RSpec

• Better Specs (RSpec Guidelines with Ruby)

Ruby on Rails

• A community-driven Rails style guide
• Api on Rails 6 - Alexandre Rousseau
• Building REST APIs with Rails
• Kestrels, Quirky Birds, and Hopeless Egocentricity - Reg Braithwaite
• Learn Ruby on Rails as You Modify a Craigslist Clone
• Learn Ruby on Rails: Book One - Daniel Kehoe (PDF, EPUB) (Leanpub account or valid email requested)
• Objects on Rails - Avdi Grimm
• Rails Girls Guides
• Ruby Notes for Professionals - Compiled from StackOverflow Documentation (PDF)
• Ruby on Rails 3.2 - Step by Step
• Ruby on Rails 4.0 Guide
• Ruby on Rails Guides
• Ruby on Rails Notes for Professionals - Compiled from StackOverflow Documentation (PDF)
• Ruby on Rails Tutorial (Rails 5): Learn Web Development with Rails - Michael Hartl
• Upgrading to Rails 4

Sinatra

• Sinatra Book

Rust

• Rust by Example
• Rust for Rubyists - Steve Klabnik
• The Rust Programming Language
• The Rustonomicon
• Why Rust? (PDF)

Sage

• Sage for Power Users - William Stein (PDF)
• The Sage Manuals

Scala

• A Scala Tutorial for Java programmers (PDF)
• Advanced Scala with Cats - Noel Welsh and Dave Gurnell (PDF, HTML, EPUB) (email address requested, not required)
• Another tour of Scala - David Copeland
• Creative Scala - Noel Welsh and Dave Gurnell (PDF, HTML, EPUB) (email address requested, not required)
• EAI Patterns with Actor Model - Vaughn Vernon
• Effective Scala
• Essential Scala - Noel Welsh and Dave Gurnell (PDF, HTML, EPUB) (email address requested, not required)
• Functional Programming for Mortals - Sam Halliday
• Functional Programming, Simplified (Scala edition) - Alvin Alexander (free preview (400 pages from 595), PDF)
• Hello, Scala - Alvin Alexander (free preview (120 pages from 257), PDF)
• Learning Scala in small bites
• Learning Scalaz
• Pro Scala: Monadic Design Patterns for the Web
• Programming in Scala, First Edition - by M. Odersky, L. Spoon, B. Venners
• Pure functional HTTP APIs in Scala - Jens Grassel
• PythonToScala - Rob Story
• S-99: Ninety-Nine Scala Problems - Phil! Gold
• Scala & Design Patterns: Exploring Language Expressivity - Fredrik Skeel Løkke (PDF)
• Scala By Example - M. Odersky (PDF)
• Scala Cookbook: Bonus Chapters - Alvin Alexander (PDF)
• Scala for Perl 5 Programmers - Breno G. de Oliveira
• Scala School by Twitter
• Scala Succinctly - Chris Rose
• Scala Tutorial - Tutorials Point
• tetrix in Scala
• The Neophyte's Guide to Scala - Daniel Westheide
• The Type Astronaut's Guide to Shapeless - Dave Gurnell (PDF, HTML, EPUB) (email address requested, not required)
• Xtrace

Lift

• Exploring Lift (published earlier as "The Definitive Guide to Lift", PDF)
• Lift
• Lift Cookbook - Richard Dallaway
• Simply Lift - David Pollak (PDF)

Play Scala

• Essential Play - Dave Gurnell (PDF, HTML, EPUB) (email address requested, not required)
• Play Framework Recipes - Alvin Alexander

Scheme

• A Pamphlet Against R. Computational Intelligence in Guile Scheme
• An Introduction to Scheme and its Implementation
• Concrete Abstractions: An Introduction to Computer Science Using Scheme - M. Hailperin, B. Kaiser, K. Knight
• Scheme Tutorial
• Simply Scheme: Introducing Computer Science - B. Harvey, M. Wright
• Teach Yourself Scheme in Fixnum Days
• The Scheme Programming Language: Edition 3 - The Scheme Programming Language: Edition 4
• Write Yourself a Scheme in 48 Hours - Wikibooks

Scilab

• Introduction to Scilab
• Programming in Scilab
• Writing Scilab Extensions

Scratch

• An Introductory Computing Curriculum Using Scratch
• Computer Science Concepts in Scratch
• Learn to Code with Scratch - The MagPi magazine (PDF)
• Scratch Programming Playground - Al Sweigart

Sed

• Sed - An Introduction and Tutorial

Self

• The Self Handbook

Smalltalk

• Deep into Pharo - Alexandre Bergel, Damien Cassou, Stéphane Ducasse, Jannik Laval
• Dynamic Web Development with Seaside - S. Ducasse, L. Renggli, C. D. Shaffer, R. Zaccone
• Enterprise Pharo: a Web Perspective
• Numerical Methods with Pharo - Didier Besset, Stéphane Ducasse, Serge Stinckwich
• Pharo by Example - Andrew P. Black et al. (Smalltalk Implementation and IDE)
• Stef's Free Online Smalltalk Books (meta-list)

Snap

• Snap! Reference Manual - B. Harvey, J. Mönig (PDF)

Spark

• Databricks Spark Knowledge Base
• Databricks Spark Reference Applications
• Mastering Apache Spark

Splunk

• Splunk 7.x Quick Start Guide - James H. Baxter (Packt account required)

SQL (implementation agnostic)

• Developing Time-Oriented Database Applications in SQL - Richard T. Snodgrass (PDF)
• SQL For Web Nerds
• SQL Notes for Professionals - Compiled from StackOverflow Documentation (PDF)
• SQL Queries Succinctly - Nick Harrison
• Use The Index, Luke!: A Guide To SQL Database Performance

SQL Server

• Best of SQLServerCentral.com Vol 7 *(RedGate, By SQLServerCentral Authors)
• Brad's Sure Guide to SQL Server Maintenance Plans - Brad McGehee (PDF) (email address requested)
• Defensive Database Programming - Alex Kuznetsov (PDF)
• Fundamentals Of SQL Server 2012 Replication - Sebastian Meine (PDF) (email address requested)
• How to Become an Exceptional DBA, Second edition - Brad McGehee (PDF)
• Inside the SQL Server Query Optimizer - Benjamin Nevarez (PDF) (email address requested)
• Introducing Microsoft SQL Server 2008 R2
• Introducing Microsoft SQL Server 2012
• Introducing Microsoft SQL Server 2014
• Mastering SQL Server Profiler - Brad McGehee (PDF)
• Microsoft SQL Server Notes for Professionals - Compiled from StackOverflow Documentation (PDF)
• Performance Tuning with SQL Server Dynamic Management Views - Tim Ford, Louis Davidson (PDF)
• Protecting SQL Server Data - John Magnabosco (PDF)
• SQL Server 2012 Tutorials: Reporting Services
• SQL Server 2017 Administrator's Guide - Marek Chmel, Vladimír Mužný (Packt account required)
• SQL Server Backup and Restore - Shawn McGehee (PDF) (email address requested)
• SQL Server Execution Plans, Third Edition - Grant Fritchey (PDF)
• SQL Server for C# Developers Succinctly - Sander Rossel
• SQL Server Hardware - Glenn Berry (PDF)
• SQL Server Internals: In-Memory OLTP - Kalen Delaney (PDF)
• SQL Server Metadata Succinctly - Joseph D. Booth
• SQL Server Source Control Basics - Rob Sheldon, Rob Richardson, Tony Davis (PDF)
• SQL Server Statistics - Holger Schmeling (PDF)
• SQL Server Stumpers Vol.5 (PDF)
• SQL Server Tacklebox - Rodney Landrum (PDF)
• SQL Server Transaction Log Management - Tony Davis, Gail Shaw (PDF)
• The Art of SQL Server FILESTREAM - Jacob Sebastian, Sven Aelterman (PDF)
• The Art of XSD - Jacob Sebastian (PDF)
• The Best of SQLServerCentral.com Vol 7 (PDF)
• The Redgate Guide to SQL Server Team-based Development - Phil Factor, Grant Fritchey, Alex Kuznetsov, Mladen Prajdić (PDF)
• Troubleshooting SQL Server: A Guide for the Accidental DBA - Jonathan Kehayias, Ted Krueger (PDF)

Standard ML

• Introduction to Standard ML - Atsushi Ohori (PDF)
• Programming in Standard ML '97 - Stephen Gilmore, University of Edinburgh
• Programming in Standard ML, DRAFT - Robert Harper (PDF)
• SML# Document - Atsushi Ohori, Katsuhiro Ueno
• The Definition of Standard ML (Revised) - SMLFamily GitHub project (PDF)

Subversion

• Subversion Version Control (PDF)
• Version Control with Subversion

Swift

• Essential Swift - Krzysztof Kowalczyk (Compiled from StackOverflow Documentation)
• Hacking with Swift
• Swift Notes for Professionals - Compiled from StackOverflow Documentation (PDF)
• The Swift Programming Language (HTML) (iBook)
• Using Swift with Cocoa and Objective-C (HTML) (iBook)

Vapor

• Vapor 3 Tutorial For Beginners - Tibor Bödecs
• Vapor Official Docs

Tcl

• Tcl Programming - Richard.Suchenwirth, et. al.

TEI

• What is the Text Encoding Initiative? - Lou Bernard

Teradata

• Teradata Books

Tizen

• Guide to Developing Tizen Native Application - Jung, Dong-Geun (Denis.Jung) (PDF)

TLA

• Specifying Systems: The TLA+ Language and Tools for Hardware and Software Engineers - Leslie Lamport (Postscript or PDF)

TypeScript

• Learn TypeScript in Y Minutes
• TypeScript Accelerated - James Porter
• TypeScript Deep Dive
• TypeScript for C# Programmers
• TypeScript Succinctly, Syncfusion (PDF, Kindle) (email address requested, not required)

Angular

• Angular 2+ Notes for Professionals - Compiled from StackOverflow documentation (PDF)
• Angular Docs
• Build a Full-Stack Web Application Using Angular & Firebase - Ankit Sharma

Deno

• Deno Manual
• FlavioCopes Deno Handbook - free PDF with registration

Unix

• An Introduction to Unix
• Beej's Guide to Unix Interprocess Communication - B. Hall (HTML,PDF)
• Commentary on the Sixth Edition UNIX Operating System - J. Lions
• INTRODUCTION TO UNIX - Mark A. Thomas
• Unix as IDE - Tom Ryder (epub, mobi)
• UNIX Commands and Concepts - Robert I. Pitts
• Unix for Poets - Kenneth Ward Church (PDF)
• Unix Toolbox - Colin Barschel
• UNIX Tutorial for Beginners

Verilog

• Verilog Quick Reference Guide - Sutherland HDL (PDF)
• Verilog Tutorial

VHDL

• Free Range VHDL - Bryan Mealy, Fabrizio Tappero (TeX and PDF)
• VHDL Tutorial
• VHDL Tutorial: Learn By Example

Vim

• A Byte of Vim
• Learn Vim (the Smart Way) (HTML) (🚧 in process)
• Learn Vim Progressively
• Learn Vimscript the Hard Way
• Use Vim Like A Pro - Tim Ottinger (Leanpub account or valid email requested)
• Vi Improved -- Vim - Steve Oualline (PDF)
• VIM-GALORE - All things Vim! (HTML)
• Vim Recipes (PDF)
• Vim Regular Expressions 101

Visual Basic

• Visual Basic .NET Notes for Professionals - Compiled from StackOverflow Documentation (PDF)
• Visual Basic Essentials
• Visual Basic Official Docs

Visual Prolog

• A Beginners' Guide to Visual Prolog
• Visual Prolog for Tyros

Web Services

• RESTful Web Services (PDF)

Windows 8

• Programming Windows Store Apps with HTML, CSS, and JavaScript, Second Edition - Kraig Brockschmidt (PDF)

Windows Phone

• Developing An Advanced Windows Phone 7.5 App That Connects To The Cloud
• Windows Phone 8 Development Succinctly - Matteo Pagani (PDF)
• Windows Phone 8.1 Development for Absolute Beginners
• Windows Phone Programming Blue Book

Workflow

• Declare Peace on Virtual Machines. A guide to simplifying vm-based development on a Mac

xBase (dBase / Clipper / Harbour)

• Application Development with Harbour - Wikibooks
• CA-Clipper 5.2 Norton Guide
• Clipper Tutorial: a Guide to Open Source Clipper(s) - Wikibooks