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.
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.