IndigoStar Software is working on an IDE for Perl called PerlEdit.

The page says "PerlEdit is free for personal non-commercial use. Commercial use require the purchase of a commercial license."

They are up to version 0.03 (Beta) for both Windows and Linux. And that page also says "Known limitations: There is no watch window. The parsing and display of variables is incomplete, it works fine for simple scalars. Variable values cannot be changed." I'm not fond of beta (except when it comes to games) so think that I will wait for it to get out of beta before I try it.