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.
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.
i3-gaps - i3-gaps is a fork of i3wm, a tiling window manager for X11.
awesome - A dynamic window manager for the X Window System developed in the C and Lua programming languages.
Fluxbox - Fluxbox is a window manager for X that was based on the Blackbox 0.61.1 code.