GhostBSD
GhostBSD is a user-friendly desktop operating system based on FreeBSD. Its default desktop is MATE, but a separate community edition with Xfce is available too.
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AgarimOS
AgarimOS is a desktop Linux distribution based on Void. It comes in several popular desktop flavours, including Cinnamon, GNOME, KDE Plasma, LXQt, MATE and Xfce, all with a limited set of applications in their default states.