The Lumina Desktop Environment (Lumina for short) is a lightweight,
XDG-compliant, BSD-licensed desktop environment that focuses specifically
on streamlining the ability to get work done while minimizing system
overhead.
It is specifically designed for PC-BSD® and FreeBSD, but has also been
ported to many other BSD and Linux operating systems. It is based on the
Qt graphical toolkit and the Fluxbox window manager, and uses a small
number of X utilities for various tasks, such as numlockx and xscreensaver.