There are several GUI widget sets available as additions to Perl, though the most common is probably Perl/Tk.

• Gtk uses Gtk+, the Gimp Toolkit.
• Gtk2 uses Gtk+ 2.x.
• Gtk3 uses Gtk+ 3.x.
• Prima uses its own toolkit.
• Perl Tk (sometimes pTk or ptk) is a collection of modules and code that attempts to wed the simple Tk widget set to perl 5.
• Tcl::Tk same as perlTk, but uses existing Tcl/Tk via Tcl, so allowing Tcl widgets
• Tkx a different, lightweight, access to Tk via Tcl.
• Qt uses the Qt toolkit.
• Wx uses the platform independent wxWidgets toolkit.

• The comp.lang.perl.tk FAQ

• Book:Perl Programming

• Stubs