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The Free Software Foundation

Mission: Preserve, protect and promote the freedom to use, study, copy, modify, and redistribute computer software, and defend the rights of Free Software users.

Primary sponsor of the GNU Project.
GNU licenses and Free Software Licensing and Compliance Lab.
Copyright owner.
Free Software Directory in partnership with UNESCO.

http://www.fsf.org/.
FSF Europe : http://www.fsfeurope.org/
Image : A GNU Head - http://www.gnu.org/graphics/agnuhead.html