The smallest, actually usable window manager.

Minimal X-window-manager with only one task. Open every window maximized. Zero configuration.

doors - Wayland compositor inspired by bswpm, with floating, tiling and scrolling layouts.

configuration and scripts for the sdorfehs window manager - sdorfehs-config/sdorfehsrc at master · trapd00r/sdorfehs-config

TinyWM is a tiny window manager that I created as an exercise in minimalism. It is also maybe helpful in learning some of the very basics of creating a window manager. It is only around 50 lines of C. There is also a Python version using python-xlib.