Aegis

From S23Wiki

A window manager for X11.

Aegis is a followup project of 4 Kahakai programmers who left the Kahakai project because it is based on bad and confusing
code wich makes it difficult to maintain.

Aegis can be found here

it is still a very early version that basicly hasn't got any functionality yet... but they are getting there
and updating there code on a daily base.