The Bullseye Crosshair Collection
bullseyecrosshairs.com
Includes modifications for the Quake Series and Half-Life.
Crosshair Central
hosted.planethalflife.gamespy.com
Provides crosshairs for Central, Quake 2, Half-Life, Counter-Strike, Sin, and Kingpin, tools, and tutorials.
3D Map Realm
3dmr.gamedesign.net
Reviews of Quake 2, Half-Life and Unreal single player maps. Also provides testing services and a discussion forum.
Poly Count
polycount.com
Includes downloads, modifications and game resources.
DAV Levels
planetquake.com
Levels and maps for Doom2, Heretic, Hexen, Half-Life, Quake and Quake2.
Cooltech Games
cooltech.rocketage.org
Patches and modifications for Half-Life, Unreal Tournament, and Quake.
Foyleman
modsonline.com
Soldier of Fortune, Serious Sam, and Return to Castle Wolfenstein.
PC Game Mods
pcgamemods.com
Maps and modifications. Covers Star Wars games, Doom 3, Half-Life 2, Enemy-Territory and Quake 3.
Mirage's Maps
xennon101.tripod.com
Maps for Half-Life and Quake 3.
Grey Fusion
greyfusion.net
Tips and ideas for editing game engines for Half-Life, the Quake Series, Red Faction, and the Unreal Series.
Super Capture the Flag
sctf.net
Includes game modifications, downloads and information. Plays on Quake and Half-Life.
Total Conversions.com
TotalConversions.com
Deals with modifications to games developed by 3DRealms.
Vondur's War Supply
planetquake.com
Includes custom maps for Quake, Quake2, Quake 3 Arena and Half-Life.
The Mastahuka Page
geocities.com
Offers maps for games including Half Life, Unreal Tournament and Blood.
VR21
vr21.com
Offers modifications and add-ons for several games, including Doom and Quake.
Wavelength
thewavelength.net
Focuses on editing and game modification in Half Life, Quake and Unreal series games. Includes downloads, tutorials and utility downloads.
Ultimate Mapping
angelfire.com
Maps for Counter Strike and Battlefield 1942.
Slacker's House
slackerz.8m.com
Unreal Tournament, Unreal Tournament 2003, and Quake 3 maps.
Garjen Software
garjen.co.uk
Add-ons, custom levels and utilities for games such as Duke Nukem 3D, Wolfenstein, and Lemmings.
M Planet
geocities.com
Includes mapping and level editing instructions, and downloads.