9wm influenced by 8½
9wm is an open source stacking window manager for X11, written by David Hogan (dhog) in 1994 to emulate the Plan 9 Second
Edition window manager, 8½. Many later minimalist window managers for
X were either inspired by, or directly derived from, 9wm. 9wm takes only 0.4 MB in RAM.The README file in the 9wm source distribution describes it like so:
9wm is an X window manager which attempts to emulate the Plan 9 window manager 81⁄2 as far as possible within the constraints imposed by X. It provides a simple yet comfortable user interface, without garish decorations or title-bars. Or icons. And it's click-to-type.