I've written a few Perl GUI scripts, almost all of them aimed at cross-platform. And all of them use Tk. Most days I don't care at all if they look exactly like MS or not. Other days I prefer they should not ;-)

I cobbled together a few of my own packages for auto-building complex Tk widgets on-the-fly. You are welcome to steal them en masse if you like. I use them as separate packages embeded right into my scripts. The latest example follows:

gus_xml-rpc_client_tk.pl