What is NsCDE?
Not so Common Desktop Environment (NsCDE) is a retro but powerful (kind of) UNIX desktop environment which resembles CDE look (and partially feel) but with a more powerful and flexible framework beneath-the-surface, more suited for 21st century unix-like and Linux systems and user requirements than original CDE. NsCDE can be considered as a heavyweight FVWM theme on steroids, but combined with a couple other free software components and custom FVWM applications and a lot of configuration, NsCDE can be considered a lightweight hybrid desktop environment.
sudo apt update sudo apt install nscde-desktop
or via APTus→ Desktop tab → NsCDE icon
License: GNU GPL 3