### Bash
* [Learn Shell Programming](http://www.learnshell.org)


### C
* [Learn C](http://www.learn-c.org/)


### C#
* [Learn C#](http://www.learncs.org/)


### Clojure
* [Clojure Koans](http://clojurekoans.com/)
* [ClojureScript Koans](http://clojurescriptkoans.com/)
* [Try Clojure](http://tryclj.com/)


### CoffeeScript
* [Smooth CoffeeScript, Interactive Edition](http://autotelicum.github.io/Smooth-CoffeeScript/interactive/interactive-coffeescript.html)


### Erlang
* [Try Erlang](http://www.tryerlang.org/)


### F#
* [Try F#](http://www.tryfsharp.org/)


### Git
* [Githug](https://github.com/Gazler/githug) (Tutorial in shell)
* [Learn Git Branching](http://pcottle.github.io/learnGitBranching/)
* [Try Git](http://try.github.io)


### Go
* [Go Koans](https://github.com/cdarwin/go-koans)
* [The Go Tutorial](http://golang.org/doc/go_tutorial.html)


### Haskell
* [Try Haskell!](http://tryhaskell.org/)


### HTML&CSS
* [Learn HTML & CSS interactively](http://www.codecademy.com/tracks/web)
* [Prototyping a professional website](http://www.codecademy.com/skills/prototyping)


### Java
* [CodingBat code practice](http://codingbat.com/java)
* [Learn Java](http://www.learnjavaonline.org/)


### JavaScript
* [Codecademy jquery track](http://www.codecademy.com/tracks/jquery)
* [Javascript interactive tutorial](http://www.codecademy.com/tracks/javascript)
* [Learning Advanced JavaScript](http://ejohn.org/apps/learn/)
* [Learn JavaScript](http://www.learn-js.org/)
* [Learn knockout.js](http://learn.knockoutjs.com)
* [Try jQuery](http://try.jquery.com/)


### Lisp
* [Lisp Koans](https://github.com/google/lisp-koans)


### MATLAB
* [Interactive Tutorials for MATLAB, Simulink, Signal Processing, Controls, and Computational Mathematics](http://www.mathworks.com/tutorials)


### Node
* [Node School](http://nodeschool.io/)


### NoSQL
* [MongoDB Koans](https://github.com/chicagoruby/MongoDB_Koans)
* [Try Redis](http://try.redis.io/)


### Objective-C
* [Try Objective-C](http://tryobjectivec.codeschool.com)


### Ocaml
* [Try Ocaml](http://try.ocamlpro.com/)


### PHP
* [CodeCademy PHP](http://www.codecademy.com/tracks/php)
* [Learn PHP](http://www.learn-php.org/)


### Python
* [Codecademy Python course](http://www.codecademy.com/tracks/python)
* [How to Think Like a Computer Scientist: Learning with Python, Interactive Edition](http://interactivepython.org/courselib/static/thinkcspy/index.html)
* [Learn Python](http://www.learnpython.org/)
* [Python Koans](https://github.com/gregmalcolm/python_koans)


### R
* [Try R](http://tryr.codeschool.com)


### Ruby
* [CodeCademy Ruby](http://www.codecademy.com/tracks/ruby)
* [Codeschool Ruby paths](https://www.codeschool.com/paths/ruby)
* [Ruby Koans](http://www.rubykoans.com/)
* [RubyMonk - Interactive Ruby tutorials](http://rubymonk.com)
* [The Odin Project](http://www.theodinproject.com/)
* [Try Ruby](http://tryruby.org/)


### Scala
* [Scala Tour](http://www.scala-tour.com/)


### Vim
* [Interactive Vim Tutorial](http://www.openvim.com/tutorial.html)