Trinity Desktop (forked from KDE 3.5.10) seems to still be going—- last release was on 20221030:

https://www.trinitydesktop.org/news.php

I used them both, and think 3 was better. GNOME, on the other hand, was OK at version 1 (contemporaneous with KDE 2, which I still liked better), and went to shit at version 2 (contemporaneous with KDE 3).