I think EMWM it's a better MWM. It even has options to make the menu sticky, a la Window Maker.

https://fastestcode.org/emwm.html

It's not CDE, but close. And some author wrote a tool to pin WindowMaker dockapps in a window, perfectly usable in a corner.

https://web.archive.org/web/20250105005119/https://luke8086....

I wouldn't mind using it on my n270 netbook, but a customized OpenBSD base's FVWM it's close enough to EMWM, minus the XFT fonts.