Distinctively, Sawfish uses a LISP-like scripting language, rep, for all its code, making it very easy to extend. For example, it can incorporate keybindings for XMMS.
Sawfish doesn't come with a panel - however, it complies with GNOME, and often appears with this desktop environment.
The developers of Sawfish released version 1.1 of the system on June 29, 2003.
Can anybody add a history of the project?