Free Art License
- Copyleft license applied to artistic content and projects.
- http://artlibre.org/licence/lal/en/

Open Content License
- License for the Open Content Project
- http://www.opencontent.org/opl.shtml

kuro5hin.org: Creative Commons -NC Licenses Considered Harmful
- "One particular licensing option...is a growing problem for the free content community. It is the allow non-commercial use only (-NC) option. The 'non-commercial use only' variants of the Creative Commons licenses are non-free, and in some ways worse
- http://www.kuro5hin.org/story/2005/9/11/16331/0655

Creative Commons License Generator
- Service allowing quick and easy selection of one of a range of Open Content licenses to meet a content creators' requirements (concerning attribution, whether commercial use is allowed, and whether modification is allowed).
- http://creativecommons.org/license/

October Open Game License
- OOGL. The purpose of this License is to make a rulebook, game manual, sourcebook, supplement, or other written role-playing game document "free" in the sense that everyone is permitted to copy and redistribute it, with or without modifying it, e
- http://www.rpglibrary.org/oogl/

Open Game License
- License of the Open Gaming Foundation, as drafted by Wizards of the Coast.
- http://www.opengamingfoundation.org/ogl.html

Open Directory Project License
- The license agreement for replicating ODP data.
- http://www.dmoz.org/license.html

GNU Free Documentation License
- A version of the GPL for reference material.
- http://www.gnu.org/copyleft/fdl.html