Neko

Kirby with headphones

WolfKit

A MegaCollection Kit

Please let me know of anything else I could add in the comments at the bottom.

Wolfenstein 3D

The original FPS

Classic id Tech 0 Games

Wolfenstein 3D (Expansion: Spear of Destiny)

Blake Stone: Aliens of Gold, Blake Stone: Planet Strike, Rise of the Triad: Dark War, Super 3D Noah's Ark

Source Ports

For Wolfenstein: Wolf4SDL is the definitive one. Alternativley, use ECWolf or fork LZWolf. ECWolf powers the official Super 3D Noah's Ark rereleases. Reflection Keen also supports Keen Dreams and Catacomb 3D.

BStone for Blake Stone and rottexpr or WinRott/WinRottAPI/GLRott for Rise of the Triad. Note that the latter is very old.

Alternativley, Return of the Triad is a Doom TC, or you can play online in Wolf3D.net.

Mods

Klooni is a recreation of Doom. SplitWolf adds local multiplayer. Green Arrow is based on the comics and TV. Spear Resurrection and Spear End of Destiny are fan sequels. Project: X Insurrection is about fighting vampires. Project Totengraeber is a classic. Unsung is a WW1 story. Witching Hour is survival horror. The Orb of Dilaaria is fantasy-themed.


Find More

Wolf3D.net hosts a database of links on their Games Page

Make

WDC (Itch.io) is among the best for Wolf4SDL. VSWolfTools 2 is actually 4 seperate programs. Havoc's Wolf3D Editor can edit multiple Wolf3D games. MapEdit is the most popular DOS-based map editor. TED5 (Source code) was used by id to make the original maps.

Wolf3D.net Guides Page

Other Sites

Wolfenstein 3-D Dome

C-Dogs SDL (mentioned in Freeware) can turn Wolfenstein maps into top-down shooters.

Blzut3's Weblog

Neocities: Dannarchy (Rise of the Triad page)

Notes

Background taken from here.

Suggest more in the comments!