Here is a list of a bunch of good Doom related sites that you should know about!
- Doomworld — A very popular news site and forum
- Doomworld /idgames database — A HUGE database of custom PWADs that the community has submitted over the years
- The Doom Wiki — The best Doom wiki in my opinion
- Doom Fandom Wiki — Not my favorite wiki but has a lot of info
- Rome.ro — John Romero’s blog
- John Romero’s SI6IL (Sigil) — John Romero’s 2019 fifth episode to The Ultimate Doom
- Unused Doom Music — John Romero released some unused Doom music here
- Doom64 EX — The best way to play Doom64 on PC
- Doom64 TC Absolution — An older way to play Doom64 on PC — worth mentioning
- Zandronum — GZDoom based multiplayer source port!!! The successor to Skulltag.
- ZDaemon — Older online Doom source port — worth mentioning
- Odamex — Older online Doom source port — worth mentioning
- Doom Builder — The definitive Doom editor
- Slade — A Doom editor. Has a level editor but I use it for everything else
- OBLIGE Level Maker — randomly generated Doom levels!!!
- WadSmoosh — Combine your IWADs into one file!
- ZDoom Wiki — A GZDoom modder’s bible
- Realm667 — Lots of news, projects, and other goodies!
- Aubrey Hodges’s Bandcamp Page — The composer of PSX Doom and Doom 64’s soundtracks!
- OldDoom (Archived) — Lots of info and classic stuff on this site!
- MidiMelody.ru — Not Doom related, but a very good site for rock + metal MIDIs
- Aria Maestosa — A very easy MIDI editing software