Indie Retro News: Doom - A special third anniversary review from Retro Freak Reviews!
Doom turns 21: a celebration of Doom mods | Shacknews
Hexen: Beyond Heretic - PCGamingWiki PCGW - bugs, fixes, crashes, mods, guides and improvements for every PC game
SSZDooM (Splitscreen ZDooM) - Page 3 - ZDoom
For a awesome DooM experience on mobile with actual playable controls (why can't we customize them Bethesda?) use FREEDOOM! You can then insert your own custom doom wads. This is as close
gzdoom 4.2.1 : Free Download, Borrow, and Streaming : Internet Archive