I too am thinking this over. I have done some TK but am now trying Glade and using it with Gtk-Perl. So far I am leaning toward Galde/Gtk-Perl but need a good application to really try it out. Has anyone looked at the books Gtk+Gnome Application Development by Havoc Pennington or Developing Linux Applications with Gtk+ and CDk by Eric Harlow? Are either of these useful?