openbox -- Openbox is a windowmanager that is based on Blackbox.<hr>
<a href="http://icculus.org/openbox/">http://icculus.org/openbox/</a><hr>

Openbox is a window manager for the X11 windowing system.  It  currently
runs on a large list of platforms. It was originally based  on  Blackbox
and currently remains very similar, even  using  Blackbox  styles  (with
available  extensions)  for  its  themeing.  The  Openbox   project   is
developed, maintained, and contributed to by these individuals. You  can
see what Openbox looks like on the screenshots page.

Openbox is written entirely in C++ and maintains no dependencies on  any
libraries other than X11.
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