DAV Levels

Levels and maps for Doom2, Heretic, Hexen, Half-Life, Quake and Quake2.
http://www.planetquake.com/davlevels/

3D Map Realm

Reviews of Quake 2, Half-Life and Unreal single player maps. Also provides testing services and a discussion forum.
http://3dmr.gamedesign.net/

Mod Pages Network

Modification downloads and reviews for games including Half-Life, Unreal Tournament, Quake II and III, Rainbow Six, and Rogue Spear.
http://www.modpages.com/

Mirage's Maps

Maps for Half-Life and Quake 3.
http://xennon101.tripod.com/miragesmaps/

Grey Fusion

Tips and ideas for editing game engines for Half-Life, the Quake Series, Red Faction, and the Unreal Series.
http://www.greyfusion.net

Crosshair Central

Provides crosshairs for Central, Quake 2, Half-Life, Counter-Strike, Sin, and Kingpin, tools, and tutorials.
http://www.planethalflife.com/cc

Cooltech Games

Patches and modifications for Half-Life, Unreal Tournament, and Quake.
http://cooltech.rocketage.org/ctgames.htm

The Bullseye Crosshair Collection

Includes modifications for the Quake Series and Half-Life.
http://www.bullseyecrosshairs.com/

Vondur's War Supply

Includes custom maps for Quake, Quake2, Quake 3 Arena and Half-Life.
http://www.planetquake.com/vondur

Total Conversions.com

Deals with modifications to games developed by 3DRealms.
http://www.TotalConversions.com

Super Capture the Flag

Includes game modifications, downloads and information. Plays on Quake and Half-Life.
http://www.sctf.net/

Poly Count

Includes downloads, modifications and game resources.
http://www.polycount.com/

Slacker's House

Unreal Tournament, Unreal Tournament 2003, and Quake 3 maps.
http://slackerz.8m.com

M Planet

Includes mapping and level editing instructions, and downloads.
http://www.geocities.com/manneonline/

Foyleman

Soldier of Fortune, Serious Sam, and Return to Castle Wolfenstein.
http://www.modsonline.com/

Garjen Software

Add-ons, custom levels and utilities for games such as Duke Nukem 3D, Wolfenstein, and Lemmings.
http://www.garjen.co.uk/

VR21

Offers modifications and add-ons for several games, including Doom and Quake.
http://www.vr21.com/

The Open Source Development Team

Contains maps for Counter Strike and Unreal Tournament 2003.
http://www22.brinkster.com/osdt/

Ultimate Mapping

Maps for Counter Strike and Battlefield 1942.
http://www.angelfire.com/pro/nemo/

boodizm.net

Offers modifications, maps, scripts, tutorials and utilities for Soldier of Fortune 2 and Quake 3 Arena.
http://boodizm.net/

The Mastahuka Page

Offers maps for games including Half Life, Unreal Tournament and Blood.
http://www.geocities.com/rogeliogareizaga/index.html

Wavelength

Focuses on editing and game modification in Half Life, Quake and Unreal series games. Includes downloads, tutorials and utility downloads.
http://thewavelength.net/

Modportal

Includes reviews and downloads of modifications and maps for Half life, Quake and Unreal Tournament series games.
http://www.modportal.com/