xlib topic
sowm
An itsy bitsy floating window manager (220~ sloc!).
xwinwrap
My fork of xwinwrap. Xwinwrap allows you to stick most of the apps to your desktop background.
python-xlib
XLib in pure Python (Py2/Py3 compatible)
sara
Originally a fork of catwm, now an offspring of dwm with a streamlined featureset, plus some bspwm.
SmallWM
Xlib window manager (at one time based on tinywm, but SmallWM has long outgrown it)
shod
mouse-based window manager that can tile windows inside floating containers
xprompt
A dmenu rip-off with contextual completion
shod-old
hybrid (floating and tiling) tabbed window manager