Free Software Foundation

The Free Software Foundation (FSF) is the principal organizational sponsor of the GNU Project, maintainers of the GNU/Linux codebase, custodians of the GNU General Public License, the GNU Free Documentation License and other licenses. FSF also created and compiled the FSF/UNESCO Free Software Directory.

Contact info
Free Software Foundation Contact info:
 * Postal: Free Software Foundation, Inc., 51 Franklin Street, 5th Floor, Boston, MA 02110-1301 USA
 * Email: gnu@gnu.org
 * Voice: +1-617-542-5942
 * Fax: +1-617-542-2652.

From GNU.org:
 * Please send broken links and other web page suggestions to The GNU Webmasters at webmasters@gnu.org, Thank you.