"Xgl is a hardware accelerated X-server created by Novell. Thanks to the abilities of modern graphics cards, it uses three-dimensional rendering, which opens up a whole new bunch of possibilities for modern computer desktops.
"Xgl has recently become very popular and it can be found in many GNU/Linux distributions such as Mandriva 2007, openSUSE 10.1 and 10.2, Aurox 12 or Ubuntu 6.10. However, this technology is not the only way to obtain three-dimensional desktop effects..."