Another option that I haven't seen mentioned is OptiPerl, by Xarka at: http://www.xarka.com/optiperl
A free trial version is available for download. If you like it the user fee is $39.00 for the standard version.

It's good for cgi programming because you can set it up to run your code to a browser window. It provides syntax checking, code highlight, etc. It's a little buggy if you want to print anything out, though. And while you can set it up to run from a command line, I find it easier to just run non-cgi stuff from my C: prompt.