The Motif Developer: https://www.motifzone.com/
The Open Group: https://www.osf.org/motif/
Red Hat Software, Inc.: https://www.redhat.com/
Metro Link, Inc.: https://www.metrolink.com/
Kenton Lee: https://www.rahul.net/kenton/xsites/
Lesstif Home Page: https://www.lesstif.org/