DoomGate is a German-language Doom reference site packed with maps, WAD information, version notes, cheat codes, BFG documentation, console material, editing guidance, downloads, FAQs, and mirrors from the long-running Doom community.
The TeamTNT memorial preserves the history of the distributed Doom mapping group behind TNT: Evilution, Icarus, Eternal Doom, Boom, and one of the clearest examples of fan modding crossing into official game development.
psDooM turned Unix process management into a Doom level where running processes appeared as monsters, wounding them changed priority, and killing them could terminate the process.
ToastyTech's Doom pages preserve decades of custom levels, alpha screenshots, joke skins, unfinished experiments, and the stubborn afterlife of a 1993 game.
DrNostromo.com openly embraces its old-school design and has kept accumulating movie reviews, music, game material, Doom history, image galleries, and personal projects since 1995—with no ads, tracking, registration, or apparent desire to become a platform.
Dennis Chao's 1999 PSDoom experiment mapped Unix processes to Doom monsters so a system administrator could renice them by shooting and kill them by finishing the job.