AJAX Regular Expression Evaluator
Add this one to your toolbox! Rex V is an AJAX regular expression evaluator that will help you create your PCRE, Posix and Javascript regular expressions. I’ve seen many of these tools popup on the web lately, and I must say the UI on this one is what puts it at the top of my list.



Another good one to try, suporting 6 languages is ReJax:
http://www.projects.aphexcreations.net/rejax/