- GNU General Public License
http://www.gnu.org/licenses/gpl-3.0.txt
http://www.gnu.org/licenses/gpl-2.0.txt

- Art Libre / Free Art
http://artlibre.org/licence/lal/
http://artlibre.org/licence/lal/en/

- Creative Commons Attribution-Share Alike 3.0 Unported
http://creativecommons.org/licenses/by-sa/3.0/
- Creative Commons Attribution 3.0 Unported
http://creativecommons.org/licenses/by/3.0/

- EFF Open Audio License: Version 1
http://web.archive.org/web/20040603070029/www.eff.org/IP/Open_licenses/eff_oal_version1.php
http://parolas.thebbs.org/sincanon/cancrena/oal-1-0-1.txt

- WTFPL - Do What The Fuck You Want To Public License
http://sam.zoy.org/wtfpl/