Are you looking for a tool that helps you build regular expressions and provides a realtime indication of matches and captures?
I found Roger Jolly’s RegExhibit (direct download link) to fit my needs best. I like it more than Reggy, because of the way it also indicates captures.
If you’re dealing a lot with regular expressions on a Mac and don’t want to go to the command line, RegExhibit is the swiss army knife to go for.


Thanks! I was looking for something and this has helped!