Guide to window managers for the X Window System. Descriptions, screenshots and configuration files for all popular window managers, along with related resources, including a news and discussion area. http://xwinman.org/
An extensible window manager using a Lisp-based scripting language. All window decorations are configurable and all user-interface policy is controlled through the extension language. This is no layer on top of twm, but a wholly new architecture. http://sawmill.sourceforge.net/
wmx is also a window manager. Home page quote : "wmx is a window manager for X. It's based on wm2, and it retains a similar look and feel, but it's intended to provide an experimental vehicle for features that fall comfortably outside the scope of th http://www.all-day-breakfast.com/wmx/