Open Motif (or, unofficially, OpenMotif) is a source code release of the Motif computer programming toolkit by The Open Group, the current owners of Motif.
http://en.wikipedia.org/wiki/Open_Motif
Motif is a widget toolkit for building graphical user interfaces under the X Window System on Unix and other POSIX-compliant systems. It emerged in the 1980s as Unix workstations were on the rise, as a competitor to the OPEN LOOK GUI.
http://en.wikipedia.org/wiki/Motif_%28widget_toolkit%29