[phzbOx]

I'm surprised nobody said a word about stumpwm yet (http://stumpwm.org). It's a lisp window manager built with the mentality of rat poison.

The great thing about it is how it integrate with emacs/slime. For instance, let's say you want to close all the windows from the second/third workspace, you write the code in emacs and evaluate it in the context of stumpwm.