• Starfinder rules online - Free and officially licensed
• Starfinder Society Character Options - What options from each book you can use & which books you need to own to use them

• Starfinder FAQ & Errata - Clarifications and changes to published books
• Starfinder Society Errata - Clarifications and changes to Starfinder Society Scenarios
• Starfinder Society FAQ - Clarifications and rulings for the Starfinder Society campaign

• Paizo Organized Play policies - Community standards, event & retail support, playtesting