FSWM (Fullscreen Window Manager)
Full Screen Window Manager (FSWM) is in libxcb and it uses an MIT license. It operates like mcwm, as it needs a terminal emulator to be started last in
.xsession, after the window manager. It's not quite like AntiWM, because it allows more applications to be run on top, for instance osdmixer, xclock, stalonetray and two other terminal emulators. Also, Antiwm starts up with its own terminal. This is on two monitors. Depending on where the terminal is placed, is where and how big the full screen will show, and it doesn't always display well on two monitors, as some times the application will span across them. However, the same effect can be done with mcwm, but requiring manual movement of the window to be fullscreened. MCWM contains the window inside the monitor, which fswm doesn't always do.
Applications: ytfzf (mpv) playing a YouTube video of FlightGear, osdmixer, sxhkd, xterm, xclock, gvolwheel, top, stalonetray
This window manager isn't in ports yet, but this is on FreeBSD. The keyboard controls that came with it didn't work on my installation. FSWM a good concept, but it seems a little buggy.
A feature-complete and portable full-screen window manager based on XCB, written in C89 - pbizopoulos/fswm
github.com