"Over the past few years, 3-D rendering in window managers has
become a new trend in the desktop environment. OS X was the first
to make fancy visual effects prominent in the way users interact
with the windows in their desktop. Windows Vista has also jumped on
the bandwagon with its Aero interface, though it has some
performance issues to work out. Linux users do not have to feel
left out if they too want their desktop to be a little prettier.
Beryl (formerly Compiz) gives many customizable features for users
that want 3-D rendering in Gnome, KDE, or other window
"Beryl has many animations, window effects, and just plain
useful features to allow Linux users to show off..."