There seems to be another alternative, called WxWindows
which aims to be a platform independent GUI for at least
Windows, X and Mac. They have Perl bindings available at
WxPerl at Sourceforge.
I haven't tried any of these yet though, but it looks like
a very stable, well documented API.
Jouke Visser, Perl 'Adept'
Using Perl to help the disabled: pVoice and pStory