Chocolate Doom is a Doom source port that is minimalist and historically accurate.

A portable, enhanced source port of Doom, Heretic and Hexen.

Doom Launcher is a doom launching utility and database for custom wads and pk3s

A community continuation of the OBLIGE Level Maker, originally by Andrew Apted, combined with ObAddon.

A limit-removing source port of Doom, Heretic and Hexen. It has numerous vanilla bug fixes, enhanced 640x400 and 1280x800 rendering resolutions, improved game palettes and offers many optional aesthetic game enhancements along with the maximum possible translation to the Russian language.

Cross-Platform OpenGL Doom Source Port with powerful modding features

Source port of Doom, Heretic, Hexen and Strife developed in Delphi

PSVita port of Chocolate Doom.

a wad launcher for the terminal

Small, functional and simple source ports, created with help, efforts and bits of code from people around the world.

Curses-based Doom WAD file editor

typing tutor mod for GZDoom

Main Repo for "Aetherius" (for Doom1/2 w/ GZDoom)

DoomViewer

Doom Font Creator

A random downloader of Doom maps from the idgames repository.

"Explosive Expedition" Character/RPG modification based on the character Dinah Wyck from Dynamite Duchess/Appetite For Detention/Carnival of Souls, for GZDoom. No mod-specific ACS unlike Aetherius, only ZScript :V

A cleaned up copy of heretic's source code. Successfully compiles with Watcom 1.9.

"Aetherius" Patches for iDTech1 Specfic games [Heretic/Hexen/Strife] to keep them seperate from the CompatPacks repo. :V

Minecraft's RPG mod inspired in Diablo 2 and Heretic.