Here are four reasons why Paizo is awesome.
1) The Pathfinder RPG Compatibility License—you want to publish books and indicate they’re compatible with the Pathfinder Roleplaying Game? Or post fan material using the PFRPG? Here’s the license. And a logo. Free.
2) Paizo Publishing, LLC Community Use Policy—you want to build a fansite or other free material based on Paizo-related material? Here’s the license. Free.
3) Paizo Community Use Package—If you agree to the Community Use Policy, here are our faction symbols, artwork of our iconic characters, official Paizo logos, organization symbols, regional symbols, god symbols, runes, and map of the world. Free.
4) The Pathfinder Roleplaying Game isn’t even published yet and this legal stuff is already finished and publicly available.