Oh - and a colleague and I are currently trying to write an IDE that will run and debug scripts on a web server. If we ever get it past the "crashing horribly" phase I'll post the URL here
From the Activestate website Komodo - http://aspn.ActiveState.com/ASPN/About/Komodo Komodo is a complete, powerful development environment for Perl and other languages. Komodo also includes the Rx Toolkit, which provides the unique ability to interactively step through a regular expression as it is being matched, providing support for one of the most difficult technologies used in scripting languages.
Visual Perl - http://aspn.ActiveState.com/ASPN/Downloads/VisualPerl Visual Perl is ActiveState's Perl plug-in for Visual Studio.NET. Within Visual Studio.NET, Visual Perl provides a full-featured integrated development environment that includes all the features of a modern IDE such as rich syntax aware editor, method tips, online help, and debugger support.
VIM - http://www.vim.org The "Vi IMproved" editor -- Now with Perl support. VIM provides Perl syntax highlighting, and a Perl interface. The Perl interface provides the ability to run a Perl command or run a Perl command for each line in a range. For more information on Perl support, see the Perl and VIM help page.