[ Thanks to Barnaby for this link. ]
“With the big two desktop environments changing
massively over the last few years and getting quite a bit heavier
at the same time I thought I’d look again at another alternative
that’s been a staple in the area of window managers since release
in 1997 – Window Maker.“Initially it was WindowMaker by the way, but due to a naming
conflict this had to be changed. It is designed to emulate the look
and feel of the NeXTstep GUI, an object-oriented, multitasking
operating system developed by NeXT Computer to run on its range of
proprietary workstation computers.”