The second version of the Regular Expressions Cheat Sheet, a quick reference guide for regular expressions, including symbols, ranges, grouping, assertions and some sample patterns to get you started.

I'm always on the lookout for good programmer's cheat sheets. Dave Child's site, http://addedbytes.com/cheat-sheets, has some of the best I've seen. He currently has cheat sheets for the following:

* ASP / VBScript
* CSS
* HTML
* HTML Character Entities
* JavaScript
* Microformats
* MySQL
* PHP
* Python
* RGB Hex Colour Chart
* Regular Expressions
* Ruby on Rails
* SQL Server
* Subversion
* mod_rewrite