Kalikops Headquarters
- Multi-mod servers for Hunted, Day of Defeat, and Counter-Strike. With files, maps, IRC servers, pictures, and message boards.
- http://www.kalikops.org/

UK Deathmatch Classic community
- Dedicated Half-Life Deathmatch Classic servers. Site features live players stats, map downloads and forums.
- http://www.zapper.org.uk

Free Fall
- Half-Life deathmatch classic servers with custom maps, sounds, models, plus regular and low grav servers.
- http://www.free-fall.net/

Joe.to Servers
- Includes several servers for Counter-Strike and Natural Selection, with news, forums, atciles, maps, and links.
- http://www.joe.to/

AlphaSpy
- Free tool which allows monitoring of Half-Life or Half-Life mod servers on the net and quickly see vital statistics about the server.
- http://users.bigpond.net.au/beredon/alphaspy/

Bob the Server
- Dedicated Half-Life server.
- http://www.bobtheserver.com/