ClanSpy  
   Offers news, gallery, clan links, and discussion forums.
   http://cod.clanspy.net/

After-Hourz  
   Offers server rentals for WW2-based shooters. Includes discussion forums, rules, downloads, and photo gallery.
   http://www.after-hourz.com/cod/

Call Of Duty HQ  
   Information on clans, leagues, ladders, and competitions. Also offers news, screen shots and discussion forums.
   http://www.callofduty.org.uk/

Call of Duty Element  
   Fan site with news, screen shots, contests, FAQs, discussion forums, and downloads.
   http://www.callofdutyelement.com/

CallOfDutyGaming  
   News, discussion forums, game guides, screen shots, and downloads.
   http://www.callofdutygaming.com/

Call of Duty Xtreme  
   Offers news, screen shots, discussion forums, wallpaper, and downloads.
   http://www.callofdutyx.com/

CoDadmin  
   Resource for server admins, including guides, tools, mods, providers, and discussion forums.
   http://www.codadmin.com/

CODCommand  
   FAQ, news, discussion forums, downloads, and links to reviews.
   http://www.codcommand.com/

Infinity Ward Nation  
   News, image gallery, downloads, FAQ, developer information, and discussion forums.
   http://www.iwnation.com/

TheCallOfDuty.co.uk  
   UK community hub, featuring discussion forums, downloads, and game information.
   http://www.thecallofduty.co.uk/

PlanetCallofDuty  
   Offers picture of the day, patches, news, discussion forums, clan directory, servers, mods, downloads, cheats, guides, and FAQs.
   http://www.planetcallofduty.com/

ServerStat  
   Free software to generate detailed player statistics from server log files
   http://www.serverstat.org/

Call Of Duty Boards  
   A forum offering discussion, support, downloads, modifications, and customization information.
   http://www.codboards.com/

IGN  
   Collection of cheat codes, FAQs, walkthroughs, reviews, features, movies, screenshots, news and boards.
   http://pc.ign.com/objects/550/550042.html

Call of Duty Spot  
   Fan site dedicated to server maintenance and modification. Includes screenshots, downloads and news.
   http://www.codspot.com/

FPS Central  
   News, server list, articles, clan information, discussion forums, and downloads.
   http://www.fpscentral.com/index.php?game=2

CoDFiles  
   Offers downloads as well as discussion forums and screen shots.
   http://cod.filefront.com/