TinyWM is a ridiculously tiny window manager implemented in nearly as few lines of C as possible, without being obfuscated or entirely useless. It allows you to move, resize, focus (sloppy), and raise windows -- that's it! TinyWM's main purpose is to serve as a quick example of some window manager programming basics.

Usage:
Focus follows pointer.
Alt+Button1, drag: interactive window move
Alt+Button3, drag: interactive window resize
Alt+F1: raise focused window