Free Software Foundation (FSF)
http://www.fsf.org/

The The Free Software Foundation (FSF), established in 1985, is dedicated to promoting computer users’ rights to use, study, copy, modify, and redistribute modified computer programs. The FSF promotes the development and use of free software, particularly the GNU operating system, used widely in its GNU/Linux variant. The FSF maintains the Free Software Definition. You can read more about free software in their essays section and in the philosophy section of gnu.org. This has been added to World Wide Web Reference Subject Tracer™ Information Blog. This has been added to the tools section of Research Resources Subject Tracer™ Information Blog.