RegExplorer

RegExplorer helps novice or infrequent 'regex' programmers quickly and easily build correct regular expressions through the use of pull-down menus with the correct syntactic elements listed in easy-to-read English.

You can then test your regex against large chunks of text in batch mode, and get a list of matching results, with numbered sub-expressions that you can easily show or hide at the click of a button. Search-and-replace operations are supported as well. If you aren't getting the matches you expected, just edit your regex and click the Match button to instantly re-run your test - no recompiling, no waiting, no reloading the Search Text field. Quick and easy!
Once you have the regex you want, contextual menus make it easy to cut and paste it into your REALbasic application or other PCRE-compatible regular expression scripting system. When you need a fine-tuned regex in your program, this little utility can be a real time-saver!