No matter how good programmer you are, you can`t memorize everything. It often happens to spend more time searching for a particular library, tag or declaration, than implementing it on our code. To ease your work I have gathered here some of the most important cheat sheets that you will ever need. Do you have any suggestions?
HTML Cheat Sheet
HTML/XTML in one pageHTML5: The Evolution of Web Standards by James Sugrue(X)HTML Elements and AttributesDoctype Declarations (DTDs)XHTML Character Entity ReferenceGoSquared HTML Help Sheet
CSS Cheat Sheets
CSS in one pageCSS Properties and ValuesAll CSS Properties Listed AlphabeticallyCSS Shorthand GuideGoSquared CSS Help Sheet
Adobe Flash Cheat Sheets
Flash Cheat SheetFlash CS3 Keyboard Shortcuts
ASP Cheat Sheets
Core ASP.NETASP.NET MVC Framework Cheat SheetASP.NET MVC View Cheat Sheet
PHP Cheat Sheets
PHP Basics Quick Reference SheetPHP Cheat SheetPHP Security Cheat SheetPHP Variable and Array TestsGoSquared PHP Help Sheet
MySQL Cheat Sheets
MySQL Cheat Sheet by Dave ChildMySQL Database Quick ReferenceSQL Statements Cheat Sheet
JavaScript Cheat Sheets
JavaScript in one pageJavaScript Cheat SheetAddison-Wesley’s JavaScript Reference Card
jQuery Cheat Sheets
jQuery CheatsheetjQuery 1.3 Visual Cheat Sheet by Antonio LupettijQuery Selectors by Bear Bibeault & Yehuda Katz
Unicode Cheat Sheets
The Unicode Character CodeHTML Characters, Numeric Codes, 0-65535 by Bob Stein
XML Cheat Sheets
XML in one pageXML 1.0 Syntax Quick Reference by Mulberry Technologies
mod_rewrite and .htaccess Cheat Sheets
mod_rewrite Cheat Sheet by Dave Childhtaccess Cheatsheet