Doom & Doom 2
Id Software
The creators of Doom, Doom 2, and Quake.
Nice page with links, editors, and cheats.
Another nice page with editors of all kinds.
A page with lots of stuff: Wads, Patches, Editors, Utils,
help and faqs, secretes, and links to other Doom'ers.
Quake
The creators of Doom, Doom 2, and Quake.
The best site for quake and quakeworld servers, deathmatch and many others,
editors and much much more. A must see site.
QuakeWorld
Official QuakeWorld Home Page
The official site for QuakeWorld, has QW clients, servers, and help pages.
Another huge list of server for QuakeWorld, deathmatch, capture the flag, and limbo.
The Valley Of The ThunderWalkers. A great Capture The Flag
Pod
The makers of Pod. If you haven't played POD then your missing
out on the best racing game ever.
Nice Pod site with new cars, tracks, and a forum.