Paizo's final version of the Open RPG Creative (ORC) License is released. The license is a system-agnostic, perpetual, and irrevocable open gaming license

It's built as an alternative to the OGL after the debacle earlier this year. Another useful thing in that link is the AxE or Answers and Explanations to help new authors find their way into this license. You may think this only applies to publishers, but if you use adventures from online sources, the people you use rely on these licenses to legally distribute the material to you.