Cheatsheets and various quick reference guides are available for almost any type of software and language these days. Unfortunately they’re not always easy to find when you actually need them. This is why I decided to take some time to gather up as many as possible and share them with you here!

Hopefully this can be a timesaver for you, along with teaching you a new trick or two. The resources have been divided into various categories to make them easier to find. Below are more than 100 cheat sheets and reference cards for the following topics:

CSS

CSS3 Cheat Sheet ↓

CSS2 Visual Cheat Sheet ↓

CSS Cheat Sheet (V2) ↓

Css Property Index ↓

BluePrint CSS ↓

HTML

HTML 5 Cheat Sheet ↓

HTML5 Canvas Cheat Sheet ↓

HTML5 Glossary ↓

HTML Character Entities Cheat Sheet ↓

Color Codes Matching Chart HTML (Convert CMYK, RGB Hex) ↓

Javascript

JavaScript Cheat Sheet ↓

Javascript DOM ↓

JavaScript Reference Card ↓

jQuery 1.4 API Cheat Sheet ↓

jQuery selectors ↓

jQuery 1.3.2 ↓

jQuery 1.3 ↓

jQuery 1.2 ↓

Mootools 1.2 Cheat Sheet ↓

Prototype Cheat Sheet ↓

PHP

PHP & MySQL for dummies ↓

PHP 5 Online Cheat Sheet v1.3 ↓

PHP5 Cheat sheet ↓

PHP Manual Quick Reference ↓

Printable PHP Security Checklist ↓

PHP Functions to work with MySQL ↓

MySQL

MySQL Cheat Sheet ↓

Handy Cheat Sheet of MySQL Commands ↓

HTML Colors Cheat Sheet ↓

RGB Hex Colour Chart ↓

Web Safe Color Chart ↓

The Browser-Safe Colors ↓

Megapixels Chart (and print size) ↓

Points to pixels conversion ↓

Web Safe Fonts v2 (including Google API) ↓

25-point Website Usability Checklist ↓

Webdesign for dummies ↓

The Web Developer’s SEO Cheat Sheet ↓

SEO for dummies ↓

Will the browser apply the rule(s)? ↓

When can I use? Compatibility tables (html5, css3 + +) ↓

CMS

WordPress Help Sheet ↓

The Advanced WordPress Help Sheet ↓

WordPress Theme Development Checklist ↓

WordPress Template Tags ↓

WordPress Optimization Cheat Sheet ↓

SEO for WordPress ↓

Drupal 7: The database ↓

Drupal 6 API Cheat Sheet ↓

Drupal for dummies ↓

Joomla 1.5 Basic Template Cheat Sheet ↓

Joomla for dummies ↓

Softwares

ActionScript 3.0 ↓

Adobe Flex3 ↓

Adobe Air Cheat Sheet ↓

Adobe Acrobat 9 Shortcuts ↓

Adobe Acrobat 8 Quick Reference ↓

Adobe Flash CS5 & Flash Catalyst for dummies ↓

Adobe Flash CS4 Shortcuts ↓

Adobe Dreamweaver CS5 – all in one for dummies ↓

Dreamweaver CS4 shortcuts ↓

DreamWeaver CS3 Reference Card ↓

Adobe Fireworks CS3 Quick Reference ↓

Adobe After Effects CS4 Cheat Sheet ↓

Adobe Illustrator CS4 Shortcuts ↓

Adobe Photoshop CS5 – all in one for dummies ↓

Adobe Photoshop Shortcuts ↓

Photoshop Elements8 For Dummies ↓

Adobe Lightroom 2.0 Shortcuts ↓

Adobe Indesign CS5 for dummies ↓

Adobe InDesign CS4 Tools and shortcuts ↓

GIMP Quick reference ↓

Apple Final Cut Pro 5 ↓

QuarkXpress 8 ↓

3DS max 9 ↓

Blender for dummies ↓

AutoCAD 2011 for dummies ↓

Google Sketchup 7 for dummies ↓

OpenOffice.org for dummies ↓

Office 2010 – all in one for dummies ↓

Browsers & OS

Mozilla Firefox Cheat Sheet ↓

Google Chrome Keyboard Shortcuts ↓

Internet Explorer 8 – quick reference card ↓

Windows 7 Cheat Sheet ↓

Windows Alt Codes ↓

Ultimate Switcher Guide: PC to MAC ↓

Mac OS X Keyboard Cheat Sheet ↓

Mac OS X Leopard – 200 productivity boosters ↓

Macs All-in-one for dummies ↓

Linux for dummies ↓

Ubuntu reference ↓

Ruby on Rails Cheat Sheet ↓

Python Cheat Sheet ↓

ASP/VBScript Cheat Sheet ↓

ASP.net ↓

Regular Expression Cheat Sheet (.NET) ↓

Core C# and .NET Quick Reference ↓

960 Grid System Cheat Sheet ↓

Firebug Cheat Sheet ↓

Tcp Ports List ↓

VOIP Basics ↓

VI (Linux Terminal) Cheat sheet ↓

Mathematica Keyboard Shortcuts ↓

Country Codes – quick reference ↓

User Centred Design ↓

The Social Landscape (social media) ↓

Your Turn To Talk

We hope you found our list of cheatsheets/quick references useful. If we missed any or you have other feedback, please leave a comment. Also remember to share this post if you found it useful! ;)