in reply to Perl Development Tools
Komodo also has a very useful Regex-tool, ppm install GUI, can integrate with versioning software and do FTP. Although I didn't try it myself it says it can do remote debugging. The debugger has watches and all the usual debugging tools. Finally, you can open an interactive Perl-shell within itself.
"If you have four groups working on a compiler, you'll get a 4-pass compiler." - Conway's Law