From a historical-software/UI perspective, I'm curious what that Motif software looks like, and how, er, findable it is.

Studying old systems that have fallen by the wayside can often be instructive.

Still found on Aix and HP-UX systems, which are the surviving ones. Solaris dropped it, and all other commercial big iron UNIXes are dead.

You can get some screenshots here

https://en.wikipedia.org/wiki/Common_Desktop_Environment

https://sourceforge.net/projects/cdesktopenv/

Woops, didn't notice this till now. I wasn't referring to Motif itself, rather the debugger programs. Contemporary UIs are always interesting to study!

It's awesome that Motif and CDE are finally open source though.