perl.org Perl Debugging Tools
Available Tools for debugging
There are several tools available in perl for debugging and similar tasks
Built in command line debugger
perl -d yourcode.pl
Perl/Tk based graphical debugger by Andrew E. Page
This a free tool running both on Linux and Windows written in LISP.
Source code is not available.
The Perl Regex debugger and an article about it written by Mark Jason Dominus
Debug B modules and optrees.