The Tk module is most often used to create graphical user interfaces in perl. Be forewarned that there is a slight learning curve involved at first, but it does get easier to understand after working with it. Also available is the GD.pm module which is also found on CPAN. Jouke wrote a review of that module which can be found here.
TStanley
-------- There's an infinite number of monkeys outside who want to talk to us
about this script for Hamlet they've worked out -- Douglas Adams/Hitchhiker's Guide to the Galaxy