compiz-core - 2:0.8.18-6+b1 main

Compiz brings to life a variety of visual effects that make the Linux desktop
easier to use, more powerful and intuitive, and more accessible for users
with special needs.
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Compiz combines together a window manager and a composite manager using
OpenGL for rendering. A "window manager" allows the manipulation of the
multiple applications and dialog windows that are presented on the screen. A
"composite manager" allows windows and other graphics to be combined together
to create composite images. Compiz achieves its stunning effects by doing
both of these functions.