This page details other sources of material for Open Gaming.
articles.opengamingnetwork.com – Articles by the Open Gaming Network – new material, reviews, and interviews with those involved with Open Gaming.
Maps by Dyson Logos – Dyson has added 156 (at time of writing) royalty-free maps to his website for you to use in making your own products (or just for use in your games at home, if you prefer)
Open Gaming Foundation – The Open Gaming Foundation is a private organization, dedicated to supporting the ideals of the Open Gaming philosophy. (Site does not appear to have been updated since 2003, but was one of the first places to centrally locate copies of various Open Gaming licenses)