Collecting All The Cheat Sheets
Now we already have:
Python Cheat Sheet
jQuery Cheat Sheet
NodeJS Cheat Sheet
PHP Cheat Sheet
Ruby Cheat Sheet
Javascript Cheat Sheet
Java Cheat Sheet
ActionScript Cheat Sheet
CSS Cheat Sheet
Git Cheat Sheet
SVN Cheat Sheet
MySQL Cheat Sheet
Regex Cheat Sheet
Linux Cheat Sheet
HTML Cheat Sheet
HTML-DOM Cheat Sheet
mod_rewrite Cheat Sheet
And 300+ More