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.
Open Game License License of the Open Gaming Foundation, as drafted by Wizards of the Coast.
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 than traditional copyright law -- because it can be harder to move away from them once people have made the choice." (September 11, 2005)