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Sabayon
Who should use Sabayon? Sabayon is geared towards anyone who has need of providing a standardized GNOME desktop to their end users. Teachers who administer labs, Libraries, and Businesses all have need to have a "locked down" desktop, and can make good use of Sabayon Sabayon has a built in help guide, which can be accessed by the Help menu from the desktop editor screen.
The GNOME Desktop is licensed under the GPL and LGPL , so it is only natural that the artwork in GNOME is licensed with same ideas of freedom and co-operation. The original art.gnome.org became difficult to maintain and was badly in need of a face lift. This new version still includes the many themes and backgrounds that have been submitted over the years, but in a very much simplified layout. If you'd like to help improve art.gnome.org, pop into #gnome-art on irc.gnome.org or join the mailing list .
GNOME Art - Artwork & Themes