* Added Portuguese and Italian Translations.
Added Portuguese and Italian Translations of the book Python For Everybody by Dr. Charles Russell Severance
* Update free-programming-books.md
Updated the link to the latest edition.
* Update free-programming-books.md
Updated edition for the book with author and links in three places.
* Update free-programming-books.md
Added Think DSP - Digital Signal Processing in Python.
* Update free-programming-books.md
Added Think Data Structures: Algorithms and Information Retrieval in Java.
* Update free-programming-books.md
Added two new books;
Think C++: How To Think Like a Computer Scientist
Modeling and Simulation in Python
* Minor changes to adhere to Contributing.md
Thanks to @kashirash
Suggested edits to pass travis-ci and respecting markdown formatting.
* [Immersione in Python 3](http://gpiancastelli.altervista.org/dip3-it/) - Mark Pilgrim, _traduzione di: Giulio Piancastelli_ (HTML) [(PDF)](http://gpiancastelli.altervista.org/dip3-it/d/diveintopython3-it-pdf-latest.zip)
* [Immersione in Python 3](http://gpiancastelli.altervista.org/dip3-it/) - Mark Pilgrim, _traduzione di: Giulio Piancastelli_ (HTML) [(PDF)](http://gpiancastelli.altervista.org/dip3-it/d/diveintopython3-it-pdf-latest.zip)
* [La libreria di riferimento di Python](http://docs.python.it/html/lib/)
* [La libreria di riferimento di Python](http://docs.python.it/html/lib/)
* [Pensare da Informatico, Versione Python](http://www.python.it/doc/Howtothink/Howtothink-html-it/index.htm)
* [Pensare da Informatico, Versione Python](http://www.python.it/doc/Howtothink/Howtothink-html-it/index.htm)
* [Python per tutti: Esplorare dati con Python3](http://do1.dr-chuck.com/pythonlearn/IT_it/pythonlearn.pdf) - Dr. Charles Russell Severance (PDF) [(EPUB)](http://do1.dr-chuck.com/pythonlearn/IT_it/pythonlearn.epub)
* [Lógica Computacional (com Prolog)](http://www4.di.uminho.pt/~mjf/pub/LC-Prolog.pdf) - Maria João Frade (PDF)
* [Lógica Computacional (com Prolog)](http://www4.di.uminho.pt/~mjf/pub/LC-Prolog.pdf) - Maria João Frade (PDF)
### Python
* [Python Para Todos: Explorando Dados com Python 3](http://do1.dr-chuck.com/pythonlearn/PT_br/pythonlearn.pdf) - Dr. Charles Russell Severance (PDF) [(EPUB)](http://do1.dr-chuck.com/pythonlearn/PT_br/pythonlearn.epub)
* [The Boost C++ libraries](http://theboostcpplibraries.com)
* [The Boost C++ libraries](http://theboostcpplibraries.com)
* [The Rook's Guide to C++](http://rooksguide.org/2013/11/26/version-1-0-is-out/) (PDF)
* [The Rook's Guide to C++](http://rooksguide.org/2013/11/26/version-1-0-is-out/) (PDF)
* [The Ultimate Question of Programming, Refactoring, and Everything](https://www.gitbook.com/book/alexastva/the-ultimate-question-of-programming-refactoring-/details)
* [The Ultimate Question of Programming, Refactoring, and Everything](https://www.gitbook.com/book/alexastva/the-ultimate-question-of-programming-refactoring-/details)
* [Think C++: How To Think Like a Computer Scientist](https://greenteapress.com/wp/think-c/) - Allen B. Downey (PDF)
* [Thinking in C++, Second Edition, Vol. 1.](https://archive.org/details/TICPP2ndEdVolOne) - Bruce Eckel [(Vol. 2)](https://archive.org/details/TICPP2ndEdVolTwo)
* [Thinking in C++, Second Edition, Vol. 1.](https://archive.org/details/TICPP2ndEdVolOne) - Bruce Eckel [(Vol. 2)](https://archive.org/details/TICPP2ndEdVolTwo)
* [The Java Web Scraping Handbook](https://www.scrapingbee.com/java-webscraping-book) - Kevin Sahin (PDF, HTML)
* [The Java Web Scraping Handbook](https://www.scrapingbee.com/java-webscraping-book) - Kevin Sahin (PDF, HTML)
* [Think Data Structures: Algorithms and Information Retrieval in Java](https://greenteapress.com/wp/think-data-structures/) - Allen B. Downey (PDF, HTML)
* [Think Java: How to Think Like a Computer Scientist](http://greenteapress.com/thinkapjava/) - Allen B. Downey and Chris Mayfield
* [Think Java: How to Think Like a Computer Scientist](http://greenteapress.com/thinkapjava/) - Allen B. Downey and Chris Mayfield
* [Welcome to Java for Python Programmers](https://runestone.academy/runestone/books/published/java4python/index.html) - Brad Miller
* [Welcome to Java for Python Programmers](https://runestone.academy/runestone/books/published/java4python/index.html) - Brad Miller
* [Welcome to the Java Workshop (2006)](http://javaworkshop.sourceforge.net) - Trevor Miller
* [Welcome to the Java Workshop (2006)](http://javaworkshop.sourceforge.net) - Trevor Miller
* [How to Make Mistakes in Python](http://www.oreilly.com/programming/free/files/how-to-make-mistakes-in-python.pdf) - Mike Pirnat (PDF) (1st edition)
* [How to Make Mistakes in Python](http://www.oreilly.com/programming/free/files/how-to-make-mistakes-in-python.pdf) - Mike Pirnat (PDF) (1st edition)
* [How to Think Like a Computer Scientist: Learning with Python, Interactive Edition](http://interactivepython.org/courselib/static/thinkcspy/index.html) (3.2)
* [How to Think Like a Computer Scientist: Learning with Python, Interactive Edition](http://interactivepython.org/courselib/static/thinkcspy/index.html) (3.2)
* [How to Think Like a Computer Scientist: Learning with Python](http://www.greenteapress.com/thinkpython/thinkCSpy/) - Allen B. Downey, Jeff Elkner and Chris Meyers (2.4)
* [How to Think Like a Computer Scientist: Learning with Python](http://www.greenteapress.com/thinkpython/thinkCSpy/) - Allen B. Downey, Jeff Elkner and Chris Meyers (2.4)
* [Think Python](http://www.greenteapress.com/thinkpython/) - Allen B. Downey (2.x & 3.0)
* [Think Python 2e](https://greenteapress.com/wp/think-python-2e/) - Allen B. Downey (2.x & 3.0)
* [Intermediate Python](http://book.pythontips.com/en/latest/index.html#) - Muhammad Yasoob Ullah Khalid (1st edition)
* [Intermediate Python](http://book.pythontips.com/en/latest/index.html#) - Muhammad Yasoob Ullah Khalid (1st edition)
* [Introduction to Programming with Python](http://opentechschool.github.io/python-beginners/en/) (3.3)
* [Introduction to Programming with Python](http://opentechschool.github.io/python-beginners/en/) (3.3)
* [Introduction to Programming Using Python](http://python-ebook.blogspot.co.uk) - Cody Jackson (1st edition) (2.3)
* [Introduction to Programming Using Python](http://python-ebook.blogspot.co.uk) - Cody Jackson (1st edition) (2.3)
* [The Programming Historian](http://niche-canada.org/research/niche-digital-infrastructure-project/the-programming-historian/) - William J. Turkel, Adam Crymble and Alan MacEachern
* [The Programming Historian](http://niche-canada.org/research/niche-digital-infrastructure-project/the-programming-historian/) - William J. Turkel, Adam Crymble and Alan MacEachern