"JWM
JWM (Joe's Window Manager) is a window manager for the X Window
System written by Joe Wingbermuehle. JWM is written in C and uses
only Xlib at a minimum. Support for the following can be added as
compile-time options:
JWM is the default window manager used in Damn Small Linux,
System Rescue CD, most versions of Puppy Linux, and the
ultra-lightweight distribution Slitaz."