dwm is a dynamic window manager for X11.
dwm is only a single binary, it's source code is intended to never exceed 2000 SLOC.
dwm is customized through editing its source code, that makes it extremely fast and secure - it does not process any input data which hasn't been known at compile time, except window title names.
dwm is based on tagging and dynamic window management (however simpler than wmii or larswm).
dwm don't distinguishes between layers, there is no floating or managed layer. Wether the clients of currently selected tag are managed or not managed, you can re-arrange all clients on the fly. Popup- and fixed-size windows are treated unmanaged.
dwm uses 1-pixel borders to provide the maximum of screen real estate to clients. Small titlebars are only drawn in front of unfocused clients.
garbeam don't wants any feedback to dwm. If you ask for support, feature requests or if you report bugs, they will be ignored with a high chance. dwm is only intended to fit garbeam's needs, however you are free to download and distribute/relicense it, with the conditions of the MIT/X Consortium license.
dwm is actively developed in parallel to wmii. You can browse its source code repository or get a copy using Mercurial with following command:
hg clone http://wmii.de/cgi-bin/hgwebdir.cgi/dwm
--Anselm