RegExr 0.3.1 Beta
Edit and test regular expressions on your Mac
RegExr combines a quick reference guide to the regex syntax and the functionality to try out matching and replacing your chosen text with a regular expression.
That’s it nothing more complicated, no file saving or tabs for multiple matching. Obviously aimed at the ActionScript 3 developers amongst us, RegEx is pretty much universal so a good tool to have in your arsenal of development tools.