Some of my coworkers have been busy testing new features and updating artwork for our development tool for custom applications. To this day, nothing else allows you to rapidly build business applications and everyone is pretty happy with it. Motif added anti-aliased fonts recently, and with some Tango artwork the programs really look much nicer. GNOME themes automatically set old X resources, so the applications are now coming up in the same colors that users have selected. Not a lot of time invested, and huge gains already in appearance.
The toolkit we use is called Panther, and is from a company called Prolifics.