diff --git a/free-programming-books-es.md b/free-programming-books-es.md
index ad764b527..437e3c023 100644
--- a/free-programming-books-es.md
+++ b/free-programming-books-es.md
@@ -192,7 +192,6 @@
 
 ### PHP
 * [Manual de estudio introductorio al lenguaje PHP procedural](http://www.cursosdeprogramacionadistancia.com/static/pdf/material-sin-personalizar-php.pdf)
-* [Manual de PHP (forosdelweb.com)](http://www.forosdelweb.com/wiki/Manual_de_PHP)
 * [POO y MVC en PHP](http://www.bubok.es/libros/205199/POO-y-MVC-en-PHP)
 * [Silex, el manual oficial](http://librosweb.es/silex/)
 * [Symfony 1.4, la guía definitiva](http://librosweb.es/symfony_1_4/)
diff --git a/free-programming-books-ja.md b/free-programming-books-ja.md
index fc8708fb1..38bcfaa96 100644
--- a/free-programming-books-ja.md
+++ b/free-programming-books-ja.md
@@ -45,7 +45,6 @@
 * [Maven](#maven)
 * [Mercurial](#mercurial)
 * [ML](#ml)
-* [MySQL](#mysql)
 * [NoSQL](#nosql)
 * [Objective-C](#objective-c)
 * [OCaml](#ocaml)
@@ -125,10 +124,8 @@
 
 
 #### ソフトウェアアーキテクチャ
-* [Java プログラマのためのデザインパターン入門](http://objectclub.jp/technicaldoc/pattern/DPforJavaProgrammers) - 平鍋健児, 山田健志
 * [ギコ猫とデザインパターン](http://www.hyuki.com/dp/cat_index.html) - 結城浩
 * [サルでもわかる 逆引きデザインパターン](http://www.nulab.co.jp/designPatterns/designPatterns1/designPatterns1-1.html) - Agata Toshitaka
-* [チャートで解るリファクタリング](http://objectclub.jp/technicaldoc/refactoring/u_s_r) - 梅田政利
 * [デザインパターン](http://www.techscore.com/tech/DesignPattern/) - シナジーマーケティング株式会社
 
 
@@ -173,7 +170,6 @@
 
 
 ### AppleScript
-* [AppleScript 最速基本文法マスター](http://mc909j.blogspot.jp/2013/03/applescript.html) - Tsutomu
 * [Applescriptのごく基本的なサンプル](http://www.asahi-net.or.jp/~va5n-okmt/factory/applescript/sample_code/) - Okamoto
 * [Bash でやってることを AppleScript でやろうとするとこうなる](http://qiita.com/mattintosh4/items/353c57ba75eda20af3c4) - id:mattintosh4
 * [AppleScript 言語ガイド(改訂版)](https://sites.google.com/site/zzaatrans/home/applescriptlangguide)
@@ -277,6 +273,7 @@
 * [Spock Framework リファレンスドキュメント](http://spock-framework-reference-documentation-ja.readthedocs.org/ja/latest/) - Peter Niederwieser, Kazuki YAMAMOTO
 * [G*ワークショップZ May 2013 - Spockハンズオンの資料](https://github.com/yamkazu/spock-workshop/tree/master/docs) - Kazuki YAMAMOTO
 
+
 ### Haskell
 * [Haskell基礎文法最速マスター](http://d.hatena.ne.jp/ruicc/20100131/1264905896) - id:ruicc
 * [お気楽 Haskell プログラミング入門](http://www.geocities.jp/m_hiroi/func/haskell.html) - 広井誠
@@ -360,11 +357,10 @@
 * [Mercurial: The Definitive Guide](http://foozy.bitbucket.org/hgbook-ja/index.ja.html) - Bryan O'Sullivan, 藤原克則(翻訳)
 * [Mercurial チュートリアル hginit.com の和訳](http://d.hatena.ne.jp/mmitou/20100501/1272680474) - Joel Spolsky, id:mmitou(翻訳)
 
+
 ### ML
 * [ATSプログラミング入門](http://jats-ug.metasepi.org/doc/ATS2/INT2PROGINATS/index.html)
 
-### MySQL
-* [MySQL入門](http://www.ipa.go.jp/files/000018731.pdf) (PDF) - 株式会社 リナックスアカデミー
 
 ### NoSQL
 * [MongoDBの薄い本](http://www.cuspy.org/diary/2012-04-17/the-little-mongodb-book-ja.pdf) (PDF) - Karl Seguin, 濱野司(翻訳)
diff --git a/free-programming-books.md b/free-programming-books.md
index 645ac5484..a203a3eec 100644
--- a/free-programming-books.md
+++ b/free-programming-books.md
@@ -1143,7 +1143,6 @@ See also [TeX](#tex)
 * [Ad Hoc Data Analysis From The Unix Command Line](http://en.wikibooks.org/wiki/Ad_Hoc_Data_Analysis_From_The_Unix_Command_Line)
 * [Advanced Linux Programming](http://www.advancedlinuxprogramming.com/)
 * [Automated Linux From Scratch](http://www.linuxfromscratch.org/alfs/download.html)
-* [Cross Linux From Scratch](http://trac.cross-lfs.org/wiki/download#CurrentStable)
 * [Getting Started with Ubuntu](http://ubuntu-manual.org/)
 * [GNU Autoconf, Automake and Libtool](http://sources.redhat.com/autobook/download.html)
 * [GTK+/Gnome Application Development](http://www.linuxtopia.org/online_books/gui_toolkit_guides/gtk+_gnome_application_development/index.html)
@@ -1318,8 +1317,6 @@ See also [TeX](#tex)
 
 
 ### Oracle PL/SQL
-* [PL/SQL Language Reference](http://download.oracle.com/docs/cd/E11882_01/appdev.112/e17126/toc.htm)
-* [PL/SQL Packages and Types Reference](http://download.oracle.com/docs/cd/E11882_01/appdev.112/e16760/toc.htm)
 
 
 ### Oracle Server
@@ -1570,11 +1567,7 @@ See also [TeX](#tex)
 
 
 ### Ruby
-* [Ruby in Twenty Minutes](https://www.ruby-lang.org/en/documentation/quickstart/)
-* [Programming Ruby](http://www.ruby-doc.org/docs/ProgrammingRuby/)
-* [Ruby Learning](http://rubylearning.com/)
 * [A community-driven Ruby style guide](https://github.com/bbatsov/ruby-style-guide)
-* [Ruby User's Guide](http://www.rubyist.net/~slagell/ruby/)
 * [CodeCademy Ruby](http://www.codecademy.com/tracks/ruby)
 * [Developing Games With Ruby](https://leanpub.com/developing-games-with-ruby/read)
 * [I Love Ruby](http://goo.gl/1qrMUN)
@@ -1583,13 +1576,16 @@ See also [TeX](#tex)
 * [Learn to Program, by Chris Pine](http://pine.fm/LearnToProgram/)
 * [Mr. Neighborly's Humble Little Ruby Book](http://www.humblelittlerubybook.com/)
 * [Practicing Ruby](https://github.com/elm-city-craftworks/practicing-ruby-manuscripts)
+* [Programming Ruby](http://www.ruby-doc.org/docs/ProgrammingRuby/)
 * [Read Ruby](http://readruby.io/)
 * [Ruby Essentials](http://www.techotopia.com/index.php/Ruby_Essentials)
 * [Ruby Hacking Guide](http://ruby-hacking-guide.github.io/)
+* [Ruby in Twenty Minutes](https://www.ruby-lang.org/en/documentation/quickstart/)
 * [Ruby Koans](http://www.rubykoans.com/)
+* [Ruby Learning](http://rubylearning.com/)
 * [Ruby Programming](http://www.linuxtopia.org/online_books/programming_books/ruby_tutorial/)
+* [Ruby User's Guide](http://www.rubyist.net/~slagell/ruby/)
 * [The Bastards Book of Ruby](http://ruby.bastardsbook.com/)
-* [The Little Book Of Ruby](http://www.sapphiresteel.com/ruby-programming/The-Little-Book-Of-Ruby.html)
 * [The Unofficial Ruby Usage Guide (at Google)](http://www.caliban.org/ruby/rubyguide.shtml) - Ian Macdonald
 * [Why's (Poignant) Guide to Ruby](http://mislav.uniqpath.com/poignant-guide/) ([mirror](http://www.scribd.com/doc/2236084/Whys-Poignant-Guide-to-Ruby))
 
@@ -1795,7 +1791,6 @@ See also [LaTeX](#latex)
 
 ### Vim
 * [A Byte of Vim](http://www.swaroopch.com/notes/vim/)
-* [A guide to getting started with VIM](http://www.integralist.co.uk/posts/a-guide-to-getting-started-with-vim/)
 * [Learn Vim Progressively](http://yannesposito.com/Scratch/en/blog/Learn-Vim-Progressively/)
 * [Learn Vimscript the Hard Way](http://learnvimscriptthehardway.stevelosh.com/)
 * [Use Vim Like A Pro](https://leanpub.com/VimLikeAPro) *(Leanpub, by Tim Ottinger)*