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).

Copyleft license applied to artistic content and projects.

A version of the GPL for reference material.

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.

A share-alike licence for data and databases from Open Data Commons. Includes licence text, implementation instructions, and an FAQ.

License of the Open Gaming Foundation, as drafted by Wizards of the Coast.