portalZINE NMN | Development meets Creativity | waterproof.fr.250a93dad65183e11f078e5a3b3fc884Test your regular expression easily right on the desktop.
Link

Some other nice resources for regular expressions:
http://www.regular-expressions.info/ (Tester)
http://regexlib.com/ (my favorite)
Regular Expressions Cheat Sheet
Javascript Regular Expressions
Mac OSX widget