Check the Glade-Perl module. Glade doesn't do Tk AFAIK, but GTK, in this case Gtk-Perl. Ofcourse you need Glade too :)
If you're looking for Tcl/Tk IDE's (which is kinda like looking for trouble in here), start here.

Greetz
Beatnik
... Quidquid perl dictum sit, altum viditur.