Window manager?

[Roger]

blackbox-0.62.0 (even compiled it from source on cygwin current code)
and it works like a dream.

oh, you may need some additionals like gtk and gnome stuff but there's a
site that specifie's notes on how to get allot of the gnome libraries
and packages to compile on cygwin.

blackbox-0.62.0 works like a dream here! you can find it on
sourceforge.net

there are also several method of starting xfree86 under cygwin and i
strongly believe that this blackbox and gnome libraries should be
included on the cygwin-xfree site!