Source : Free On-Line Dictionary of Computing

GWM
     
        Generic Window Manager.  An extensible window manager for the
        {X Window System}.  It is built on top of an {interpreter} for
        the {WOOL} language.
     
        {(ftp://export.lcs.mit.edu/contrib/gwm)},
        {(ftp://avahi.inria.fr/contrib/gwm)}.