Finnish Defence Forces - Total conversion based on the Finnish armed forces. Includes downloads, backstory and weapon guides. - http://koti.mbnet.fi/fdfmod/
Filefront - Includes screenshots, modifications, and maps to download. - http://operationflashpoint.filefront.com/
Jolt : Operation Flashpoint UK - UK resource for Operation Flashpoint downloads, news, resources, tutorials, forums and information. - http://www.ofp.jolt.co.uk/
OFP Editing Center - Site dedicated to editing and modifying Operation Flashpoint, providing help, tutorials, downloads, information and a forum devoted to editing. - http://www.ofpec.com/
Operation Flashpoint Network - Provides information, ingame screenshots, game introduction, modifying/scripting information a forum and regular news. - http://www.3dactionplanet.com/flashpoint/