Linux and BSD Operating Systems
https://distrowatch.com
Blag GNU Linux (Free Libre Version Of Fedora) http://www.blagblagblag.org
gNewSense (Free Libre Version Of Debian) http://www.gnewsense.org/Main/HomePage
Parabola (Free Libre Version Of Arch)
https://www.parabola.nu
Trisquel (Free Libre Version Of Ubuntu)
https://trisquel.info
The GNU General Public License
https://www.gnu.org/licenses/gpl.html
The GNU Lesser General Public License
https://www.gnu.org/licenses/lgpl.html
The GNU Free Documentation License
https://www.gnu.org/licenses/fdl.html
The GNU Affero General Public License
https://www.gnu.org/licenses/agpl-3.0.html
Apache Software License
https://www.apache.org/licenses/LICENSE-2.0
Creative Commons
https://creativecommons.org
Full list here https://www.gnu.org/distros/free-distros.en.html