Motif is a freely available source code distribution for the Motif user interface component toolkit. Motif 2.3.7 is an updated version of Open Motif 2.3 and is a major bug fix release.
Please submit any bugs to http://bugs.motifzone.com
For support and general help, please visit the ICS MotifZone: http://motif.ics.com
The classic. I still use MWM and libXm to this day. Great to see this has finally been GPL'd.
Light weight, well documented and flexible. Works great on Linux and OS X.
Stable, tested, proven in action.