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

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

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

The Open Book Project Open Content Licence for IDG's Open Book Project. http://www.linuxworld.com/linuxworld/idgbooks-openbook/lw-oclicense.html

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

Free Art License Copyleft license applied to artistic content and projects. http://artlibre.org/licence.php/lalgb.html

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, either commercially or noncommercially. http://www.rpglibrary.org/oogl/

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/

Thinkcycle Idea open source forum seeks to create a culture of open source design innovation. http://www.thinkcycle.org/home