i3 - A dynamic tiling window manager designed for X11, inspired by wmii, and written in C.
Xmonad - xmonad is a dynamically tiling X11 window manager that is written and configured in Haskell.
Fluxbox - Fluxbox is a window manager for X that was based on the Blackbox 0.61.1 code.
i3-gaps - i3-gaps is a fork of i3wm, a tiling window manager for X11.
Openbox - Openbox is a highly configurable, next generation window manager with extensive standards support.
dwm - dwm is a dynamic window manager for X. It manages windows in tiled, monocle and floating layouts. All of the layouts can be applied dynamically, optimising the environment for the application in use and the task performed.