GNU

FSF still remains the main sponsor of the GNU Project. Savannah provides additional features for GNU projects, FSF also provides development systems for GNU software maintainers, which includes full email and shell services. We are committed to furthering the development of the GNU Operating System and enabling volunteers to easily contribute to that work.

GNU Project

GNU is not UNIX its a open source, free software....
To know more about GNU. learn from following link
http://www.gnu.org/