RATPOISON
Ratpoison
Ratpoison and StumpWM are tiling window managers for the X Window System primarily developed by Shawn Betts. Ratpoison is written in C, and StumpWM re-implements a similar window manager in Common Lisp. Their user interface and much of their functionality are inspired by the GNU Screen terminal multiplexer.The above text is a snippet from Wikipedia: Ratpoison
and as such is available under the Creative Commons Attribution/Share-Alike License.