All The Cheat Sheets That A Web Developer Needsという記事を先日見つけて，割と知らないものが多く，また便利だったのでご紹介:-)。英文のチートシートだけど，仕様を短くまとめてあるチートシートは日本人のWeb開発者も便利に使えるはず。
HTML
- HTML/XTML in one page
- HTML5: The Evolution of Web Standards by James Sugrue
- (X)HTML Elements and Attributes
- Doctype Declarations (DTDs)
- XHTML Character Entity Reference
- GoSquared HTML Help Sheet
CSS
- CSS in one page
- CSS Properties and Values
- All CSS Properties Listed Alphabetically
- CSS Shorthand Guide
- GoSquared CSS Help Sheet
PHP
- PHP Basics Quick Reference Sheet
- PHP Cheat Sheet
- PHP Security Cheat Sheet
- PHP Variable and Array Tests
- GoSquared PHP Help Sheet
MySQL
JavaScript
jQuery
- jQuery Cheatsheet
- jQuery 1.3 Visual Cheat Sheet by Antonio Lupetti
- jQuery Selectors by Bear Bibeault & Yehuda Katz
