Filefront: Includes screenshots, modifications, and maps to download.
Finnish Defence Forces: Total conversion based on the Finnish armed forces. Includes downloads, backstory and weapon guides.
Gaz's Site: Offers maps and editing tools to download.
Jolt : Operation Flashpoint UK: UK resource for Operation Flashpoint downloads, news, resources, tutorials, forums and information.
OFP Editing Center: Site dedicated to editing and modifying Operation Flashpoint, providing help, tutorials, downloads, information and a forum devoted to editing.
Operation Flashpoint Network: Provides information, ingame screenshots, game introduction, modifying/scripting information a forum and regular news.