即使经验丰富，天赋过人，也不得不承认，你并不能记得所有的东西，尤其是各种各样的语言的API，参考手册（Cheat Sheet）和Google肯定是必备，为了更方便的使用，也有很多有心的人收集整理了很多，比如下面这些。

不过，在这之前再推荐一个最近发现的插件，将这些一网打尽，很不错的体验：

All Cheat Sheets Chrome Extension

如果插件打不开，也可以直接打开网站 http://overapi.com

jQuery

• jQuery Cheat Sheet
• jQuery 1.5 Visual Cheat Sheet [.pdf]

JavaScript

• JavaScript Cheat Sheet
• JavaScript Cheat Sheet — PNG
• JavaScript Cheat Sheet — PDF
• JavaScript Reference
• JavaScript and Browser Objects Quick Reference
• Regular Expressions for JavaSript — free online quick reference

PHP

• PHP Cheat Sheet
• PHP Frameworks Cheat Sheet
• symfony PHP5 framework — Admin Generator cheat sheet — PDF
• PHP Cheat Sheet — PDF
• PHP Cheat Sheet — PNG
• PHP Cheat Sheet with special php syntax
• Regular Expressions Cheat Sheet — PNG

HTML/XHTML

• HTML Cheat Sheet
• XHTML Cheat Sheet
• A Simple Guide To HTML — Cheat Sheet
• HTML & XHTML Tag Quick Reference
• HTML Cheat Sheet
• HTML Entities
• HTML CODES CHEAT SHEET
• XHTML
• XHTML Cheat Sheet v. 1.03 — PDF

CSS

• CSS Cheat Sheet
• CSS 2 — Quick Reference Guide — PDF
• CSS Cheat Sheet — PDF
• CSS Cheat Sheet — PNG
• CSS Property Index
• Cascading Style Cheatsheet
• CSS Shorthand Guide

MySQL

• MySQL Cheat Sheet
• MySQL Cheat Sheet — PDF
• MySQL Cheat Sheet — PNG
• SQL Cheatsheet

Python

• Python Cheat Sheet
• Python 101 cheat sheet
• Python Cheat Sheet
• Python Cheat Sheet — PDF
• Python Quick Reference
• Python 2.4 Quick Reference

Ruby

• Ruby Cheat Sheet
• Ruby on Rails Cheat Sheet
• ActiveRecord Relationships — Ruby on Rails cheat sheet guide — PDF
• RubyOnRails-Cheatsheet — PDF
• Ruby on Rails Cheat Sheet — PNG
• Ruby on Rails cheat sheet guide — PDF
• Ruby quick reference
• Threadeds Ruby Cheat Sheet
• What Goes Where? — Ruby on Rails cheat sheet — PDF

Actionscript

• ActionScript Cheat Sheet
• Flash ActionScript Quick Reference [.pdf]

ASP

• ASP Cheat Sheet
• ASP / VBScript — PNG

Flash

• Flash Cheat Sheet
• Flash CS3 Keyboard Shortcuts

ASCII Character Codes

• ASCII Cheat Sheet
• Character Entity References in HTML 4 and XHTML 1.0
• HTML Character Entities Cheat Sheet — PNG
• HTML Character Entities Cheat Sheet — PDF
• HTML special character reference
• HTML — Special Entity Codes
• Special ASCII HTML Character Codes
• XHTML Character Entity Reference

XML

• XML Cheat Sheet
• XML Schema Cheat Sheet
• Fusebox 4.1 XML Cheat Sheet
• MathML Reference — PDF
• VoiceXML Reference — PDF
• XML TopicMaps 1.0 — Quick Reference Card — PDF
• XML Quick References — PDF
• XML Schema 2001: children — parents — PDF
• XML Schema 2001: elements — attributes — PDF
• XML Schema 2000/10 — PDF
• XML Schema — Structures Quick Reference — PDF
• XML Schema — Data Types Quick Reference — PDF
• XSL FO Reference — PDF
• XSLT Quick References — PDF
• XSLT Quick Reference Card — PDF
• XSLT Reference

Apache

• Apache Cheat Sheet
• htaccess Cheat Sheet
• mod_rewrite Cheat Sheet
• mod_rewrite — PNG
• mod_rewrite — PDF

Ajax

• AJAX Cheat Sheet
• What’s Ajax? — PDF
• Prototype Dissected — Cheat Sheet PNG
• scriptaculous Combination Effects — Cheat Sheet — PDF

C# and VB.NET

• C# Cheat Sheet
• C# and VB.NET Comparison Cheat Sheet — PDF
• Cheat Sheet — Casting in VB.NET and C#

CVS

• CVS Cheat Sheet
• CVS Cheat Sheet
• Subversion Quick Reference Card — PDF
• CVS Cheat-sheet

C++

• C++ Cheat Sheet
• C++ Containers Cheat Sheet
• C++ Quick Reference Sheet (Cheat Sheet) — PDF
• How to Program in C++ — Language Summary

Django

• Django Cheat Sheet
• The Django Book

Firefox

• Firefox Cheat Sheet
• Firefox Add-ons Cheat Sheet
• Firefox Keyboard Shortcuts — PDF
• Firefox Shortcuts Sheet
• Mozilla Firefox Cheat Sheet
• Mozilla Thunderbird Cheat Sheet
• Keyboard Shortcuts

Google

• Google Cheat Sheet
• Google Chrome Cheat Sheet
• Google Maps Cheat Sheet
• Google App Engine Cheat Sheet
• Gmail Shortcuts (printable cheatsheet)
• Google Advanced Operators (Cheat Sheet)
• Google Cheat Sheet (Version 1.06) — PDF
• Google Cheat Sheet — auch als PDF
• Google Cheat Sheets — auch als PDF
• Google Help : Cheat Sheet

Java

• Java Cheat Sheet
• Java Quick Reference — PDF
• SYNTAX version 1.1
• (JSP™) SYNTAX version 2.0

Microformats

• Microformats Cheat Sheet
• Microformats Cheat Sheet
• Microformats Cheat Sheet

Misc

• CHMOD Chart
• Complete listing of common camera symbols.
• The Unicode-Database
• RGB Hex Colour Chart — PNG
• Pretty Good PGP Reference Card
• Search Engine Cheat Sheet
• Quick Reference Cards

Oracle

• Oracle Cheat Sheet
• Oracle PL/SQL Cheatsheet
• Oracle Cheat Sheet
• Oracle SCM Installation Cheat Sheet

Perl

• Perl Cheat Sheet
• Perl Regular Expression -Quick Reference — PDF
• Perl Cheat Sheet
• Perl Cheat Sheet
• Perl 5 Cheat Sheet
• Perl Quick Reference Card — PDF
• Perl Regexp Quick Reference Card — PDF

Photoshop/Gimp

• Photoshop Cheat Sheet
• Gimp Cheat Sheet
• Gimp Quick Reference Card v.1.0
• Photoshop 7.0 Quick Reference Card for Windows — PDF
• Photoshop CS2 Keyboard Shortcuts (Windows) — PDF
• Photoshop CS2 Keyboard Shortcuts (Macintosh) — PDF

Regular Expressions

• Regular Expressions Cheat Sheet
• Regular Expressions Cheat Sheet
• Regular Expression Cheat Sheet (.NET)

Unix/Linux

• Linux Cheat Sheet
• Unix Cheat Sheet
• Linux Shortcuts and Commands
• quick_reference [GNU screen]
• Unix Cheat Sheet
• The One Page Linux Manual — Version 3 — PDF
• TCP Ports list (3498 ports in list)
• Treebeard’s Unix Cheat Sheet
• Essential Vim keyboard shortcuts Cheat Sheet
• VIM Quick Reference Card
• Vim Commands Cheat Sheet

Weblog

• Blogger Cheatsheet — PDF
• TypePad Cheatsheet — PDF
• Movable Type Cheatsheet — PDF
• MovableType
• WordPress Cheatsheet — PDF
• WP — WordPress Cheat Sheet Theme Tags und Plugin-API — PDF

Windows

• Windows Cheat Sheet
• An A-Z Index of the Windows NT/XP command line
• Graphical vi-vim Cheat Sheet and Tutorial
• Power Point 2000 — Keyboard Shortcuts
• POWERPOINT 2003 — Quick Reference Card
• TCP Ports list (3498 ports in list)
• Windows — Alt Key Numeric Codes

更多可以查看这里： http://overapi.com