I use Xemacs as my primary development tool. Its cperl-mode is awesome.
in reply to Perl Programming Tools - (who, what, where, when, and why)
I develop on both Linux (workstation) and Solaris (server) environments. I run Xemacs on my workstation. The efs feature makes it a breeze to edit remote files transparently as if there are local files. For some reason, this very useful feature of emacs doesn't get much mention.
Another plus is that it integrates nicely with CVS, so I can check in/out files from within the editor.
You can even start the perl debugger inside Xemacs, but it is less useful for the kind of programming I do (mostly web apps). Although, I do use perl debugger a lot for testing out code snippets.