Collection of cheat sheet Here's some Cheat Sheet you might like! (I didn't write any of them) Android Android Development Cheatsheet Programming PHP Python RegExp JavaScript jQuery 1.5 jQuery 1.6 JavaScript Scriptaculous CSS CSS 2 CSS 3 CSS 3 HTML HTML 4 HTML 5 HTML 5 Canvas HTML 5 Visual Cheat Sheet XML XML Data Structure XML Structure XSLT Linux Ubuntu Bash Grep VI VI Ref Card Sed Awk Shell Cheat Sheet Linux Security Apache Mod Rewrite Database MySQL MySQL Quick Ref Version Control SubVersion SubVersion Cheat Sheet Objective-C Xcode Macros Objective-C Quick Ref Guide Objective-C Templates Smarty