Regular Expression Editor/Helper

I’ve been using Expresso for a while now. It’s a handy tool for working with regular expressions. It has a library of regular expressions which is very helpful. The editor lets you try your regular expression against a whole bunch of test data so you can test your expression against all sorts of data. The tool has been key in my getting better at regular expressions. The best part is that it’s FREE. That just makes me feel so good.

http://www.ultrapico.com/Expresso.htm