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


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


###Git
* [Git Immersion](http://gitimmersion.com)
* [Try Git](http://try.github.io)


###Go
* [The Go Tutorial](http://golang.org/doc/go_tutorial.html)
* [Go by Example](https://gobyexample.com/)


###HTML / CSS
* [HTML Canvas Deep Dive](http://joshondesign.com/p/books/canvasdeepdive/toc.html) - Josh Marinacci


###JavaScript
* [Eloquent JavaScript](http://eloquentjavascript.net/) - Marijn Haverbeke


###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)


###NoSQL
* [MongoDB Koans](https://github.com/chicagoruby/MongoDB_Koans)


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


###Ruby
* [RubyMonk - Interactive Ruby tutorials](http://rubymonk.com)
* [CodeCademy Ruby](http://www.codecademy.com/tracks/ruby)
* [Try Ruby](http://tryruby.org/)
* [Ruby Koans](http://www.rubykoans.com/)