Compiz Reloaded is a compositing window manager that uses 3D graphics acceleration via OpenGL. It provides various new graphical effects and features on any desktop environment, including Gnome and KDE. (Short version: Wobbly windows and stuff)
Compiz Reloaded is the Further development of Compiz 0.8.x series.
Compiz Fusion is the result of a merge between the well-known Beryl composite window manager and Compiz Extras, a community set of improvements to the Compiz composite window manager. Compiz Fusion aims to provide an easy and fun-to-use windowed environment, allowing use of the graphics hardware to
... [More] render each individual window and the entire screen, to provide some impressive effects, speed and usefulness. [Less]