Computer technology was born out of a community of collaboration and knowledge sharing. In the early 1980s the practice of sharing efforts and ideas was losing momentum. Richard Stallman, taking the initiative to restore the culture he endeared, founded the GNU Project and Free Software Foundation.
GNU and FSF are cornerstones of modern Copyleft. Copyleft intends to remind persons of freedoms which Copyright takes away and allow them to share these liberties with others. Software Libre is so named to remind us of the distinction between financially free (gratis) and freedoms, which are granted (libre.)
Most software users receive comes packaged under various EULAs [End-User License Agreements.] All of these applications are released under the GNU's Not Unix General Public License. The GNU GPL is a liberating license designed [and recently re-designed] to promote software freedom. The freedoms at stake are individuals' ability to access software, examine it's structure, modify the structure to suit one's needs and give a copy of [or redistribute] the software to a friend or person in need.
It is a principal of GNUmedia to promote, first and foremost, licenses which preserve the freedoms which they allow.
Those of you familiar with OSS [Open Source Software] and OSS licenses might wonder why GNUmedia is not promoting software, on this page, which is released under other licenses - even GPL compatible licenses.