mcwm is minimalist, floating window manager written using XCB, the X protocol C binding.
The only window decoration is a thin border. All functions can be done with the keyboard, but moving, resizing, raising and lowering can also be done with the mouse.
If you don't like the default key bindings, border width, et cetera,
look in the config.h file, change and recompile.
See the manual page for how to use it.
As distributed mcwm compiles fine under FreeBSD. If you want to compile mcwm under Debian-derived GNU/Linux systems you will need these packages and their dependencies: libxcb1-dev, libxcb-atom1-dev, libxcb-keysyms1-dev, libxcb-icccm1-dev, libxcb-randr0-dev.
Other system are likely to have similar requirements.
mcwm has been forked a few times. It was the beginning of the 2bwm window manager, for instance.
Please see:
https://hack.org/mc/projects/mcwm
To contact me, write to:
Michael Cardell Widerkrantz, mc at the domain hack.org.