ptkdb is a debugger for perl that uses Perl/Tk for a user interface. Features include: Hot Variable Inspection Breakpoint Control Panel Expression List Subroutine Tree To debug a script using ptkdb invoke perl like this: perl -d:ptkdb myscript.pl ptkdb can easily be used to debug CGI scripts if your web server box is capable of running Perl/Tk applications. Just change the shebang line of your scripts to: #! /usr/bin/perl -w -d:ptkdb WWW: http://search.cpan.org/dist/Devel-ptkdb/