xdg

Freedesktop's standards and tools.

xorg

The ole semi-reliable window server.

Easy to use tiling window manager for xorg with floating popup support.

New, but not really that new blood.

Clone of the above, but built on wayland.

A wayland compositor that aims to feel like rio. Uses cage under the hood.

Simple and predictable behavior, river should be easy to use and have a low cognitive load.

A kiosk compositor for wayland.

The interesting and innovative window manager of plan9.

For when you can't just use a window manager.