Kingpin

Bullseye Crosshairs
Replacement crosshairs with installation instructions and tips for creating custom designs.
http://www.bullseyecrosshairs.com/q2sites1.shtm#KINGPIN

Gameaholic
Offers help, screenshots, cheats, demo downloads, servers, and extra levels.
http://www.gameaholic.com/games/kingpin/

GameSpot
Offers a demo, game information, hints, screen shots, and a review (7.3).
http://www.gamespot.com/pc/action/kingpinlifeofcrime/

jjaf.de
Game information, hacks, downloads, and forums.
http://jjaf.de/kingpin/

Kingpin Forever HeadQuarters: Posionville
Features news, game servers, gang list, downloads, forums, chat, reviews, skin check system, walkthroughs, screenshots, and wallpapers and desktop themes.
http://www.kingpinforever.com

Kingpin Life of Crime
News, cheat codes, binds, screenshots, and downloads.
http://www.fortunecity.com/skyscraper/y2k/1039/Index.htm

PlanetKingpin
News, information, FAQs, and reviews.
http://www.planetkingpin.com/