Opossum
Opossum is a minimal tiling window manager for X11/Linux
Opossum is a minimal tiling window manager: a fork of Catwm.
This wm's named after the "living fossil" Virginia Opossum (Didelphis virginiana).
Like the wm's namesake survivor from the "Age the Dinosaurs", Opossum has
some evolutionary fixes in archaic behavior to prevent eX-screen-tinction.