ViewKit
- Originally developed by SGI, is a C++ reuse framework for Motif. [Commercial]
- http://www.ics.com/products/vk/

Xlt widget set
- The LessTif/Motif Extension library, is a set of widgets that make programming with the Motif API easier as it adds a set of frequently used tools, mostly authored by Rick Scott.
- http://sourceforge.net/projects/xlt/

The Knvas Widget
- Provide graphical display lines, rectangles; icons and direct manipulation services for MOTIF based applications.
- http://koala.ilog.fr/jml/widgets/canvas.html

LXB
- A Linux X11/Motif GUI builder. [Open source, GPL]
- http://www.tc.umn.edu/~parki005/lxb/

LessTif
- The Hungry Programmers' version of OSF/Motif. It is source compatible with OSF/Motif 1.2, meaning that the same source should compile with both and work exactly the same. [Open source, LGPL]
- http://www.lesstif.org/

Motif Programming/Reference Manuals Volume 6A/6B
- The definitive O'Reilly Motif reference guides. Completely updated for Motif 2.1 and available for free download in various formats.
- http://www.motifdeveloper.com/news/news12.html

Motif
- Official site from Open Group Desktop Technologies.
- http://www.opengroup.org/tech/desktop/motif/

Xbae widget set
- A group of three Motif-based widgets consisting of XbaeMatrix, XbaeCaption and XbaeInput. Now maintained by the LessTif team.
- http://www.lesstif.org/Xbae.html

Motif USENET FAQ
- Browse archive of FAQ by archive, author, and category or by newsgroup.
- http://www.faqs.org/faqs/motif-faq/

Builder Xcessory PRO
- GUI Builder for Motif targeted at mission critical applications. [Commercial]
- http://www.ics.com/products/bxpro/

motifdeveloper.com
- Provides a wide range of resources and technical tips for X/Motif developers.
- http://www.motifdeveloper.com/

Motif Widgets in Motion
- Three Motif widgets to display scientific data as dynamic plot.
- http://sourceforge.net/projects/movingmotif/

X-Designer
- Commercial X/Motif GUI Builder including GUI testing and Motif to Java and Windows migration capabilities
- http://www.ist-inc.com/xd/

Open Motif Everywhere
- ICS's Open Motif built from the official Open Group sources. Precompiled binaries available on all popular Linux environments and FreeBSD.
- http://www.motifzone.net/

Xmt
- The "Motif Tools Library" containing widgets and convenience functions that simplify Motif programming.
- http://www.davidflanagan.com/software/index.htm