Ratpoison. Ratpoison: Say good-bye to the rodent Ratpoison is a simple Window Manager with no fat library dependencies, no fancy graphics, no window decorations, and no rodent dependence.
It is largely modelled after GNU Screen which has done wonders in the virtual terminal market. The screen can be split into non-overlapping frames. All windows are kept maximized inside their frames to take full advantage of your precious screen real estate. Awesome. i3. FVWM. FVWM-Crystal. Spectrwm. If you like spectrwm, check out Cyphertite!
It was conceived and coded by the same group of people who are responsible for spectrwm! Introduction spectrwm is a small dynamic tiling window manager for X11. It tries to stay out of the way so that valuable screen real estate can be used for much more important stuff. Wmii. Dwm.