Worldwide Writers Copyright Association
Offers copyright protection for screenplays, books and other literary works. Offers a script marketplace, legal contracts, and tools for the film industry.

Writers Guild of America, West
Official union site representing writers in the motion picture, broadcast, cable and new media industries. Find resources covering craft, markets, and representation.

Writers Guild of America, East
Eastern branch of the labor union, promoting and protecting the professional and artistic interests of writers in the motion picture, television, radio and communications industries.