Skulltag is a knowledge base, not a hangout and the classic Doom community already has excellent ones. These are the places we actually use and recommend:
Doomworld — doomworld.com. The community’s home since 1998: forums, news, the /idgames archive, and the annual Cacowards. Start here.
ZDoom forums — forum.zdoom.org. GZDoom development, mod releases and technical help for the ZDoom family of ports.
Zandronum — zandronum.com. The multiplayer port’s official site, forums and Discord — the place to find people to play online with.
The Sentinel’s Playground (TSPG) — allfearthesentinel.com. Server hosting and one of the most active multiplayer communities.
r/Doom — reddit.com/r/Doom. The subreddit for everything Doom, classic and modern.
Doom Wiki — doomwiki.org. The definitive reference wiki, 20+ years deep.
Spotted an error on Skulltag, or want to suggest a resource? Use the contact page, corrections genuinely help.