Alternatives and similar repositories for three

Users that are interested in three are comparing it to the libraries listed below

• ioquake / launch
  The launcher for ioquake3.
  ☆39Updated 9 years ago
• iodoom / iod3
  iodoom3 - Open source, cross platform Doom 3 (GPLv3)
  ☆108Updated 2 years ago
• NightDive-Studio / strife-ve
  Strife Veteran Edition GPL Source Release
  ☆48Updated 3 years ago
• 3dfxdev / EDGE
  EDGE Source Code
  ☆77Updated 3 years ago
• ioquake / jedi-outcast
  ☆53Updated 7 years ago
• FlatRockSoft / Hovertank3D
  GPL release of Hovertank 3D source code.
  ☆249Updated 11 years ago
• libretro / tyrquake
  Libretro port of Tyrquake (Quake 1 engine)
  ☆42Updated 4 months ago
• omcfadde / dante
  idTech4 OpenGL ES2.0 | #dante (irc.freenode.net)
  ☆112Updated 13 years ago
• xonotic / darkplaces
  Mirror of https://gitlab.com/xonotic/darkplaces - The Quake engine that powers Xonotic https://xonotic.org
  ☆186Updated last month
• svn2github / quakespasm
  This is a clone of an SVN repository at svn://svn.code.sf.net/p/quakespasm/code/trunk. It had been cloned by http://svn2github.com/ , but…
  ☆10Updated 6 years ago
• xythobuz / OpenRaider
  Open Source Tomb Raider Engine
  ☆84Updated last year
• videogamepreservation / blood
  The "Blood Alpha" source code for Blood (1997) by Monolith Productions.
  ☆79Updated 7 years ago
• svkaiser / strife-ve
  Strife Veteran Edition GPL Source Release
  ☆135Updated 3 years ago
• Doom-Utils / deutex
  WAD composer for Doom, Heretic, Hexen, and Strife
  ☆68Updated 7 months ago
• OpenSourcedGames / Heretic
  ☆48Updated 12 years ago
• videogamepreservation / hexen
  Hexen: Beyond Heretic (1995) by Raven Software
  ☆50Updated 9 years ago
• madame-rachelle / qzdoom-old
  Experimental fork that tries out daring and cutting edge features. Forked from here - https://github.com/zdoom/gzdoom
  ☆72Updated 2 years ago
• CatacombGames / Catacomb3D
  Catacomb 3D source code
  ☆198Updated 11 years ago
• CatacombGames / CatacombAbyss
  Catacomb Abyss source code
  ☆85Updated 11 years ago
• ioquake / jedi-academy
  ☆53Updated 12 years ago
• CatacombGames / CatacombArmageddon
  Catacomb Armageddon source code
  ☆37Updated 11 years ago
• videogamepreservation / rott
  Rise of the Triad: Dark War (1994) by Apogee Software, Ltd.
  ☆99Updated 7 years ago
• CatacombGames / TheCatacomb
  Catacomb 2 source code
  ☆71Updated 11 years ago
• mozzwald / wolf4sdl
  Wolfenstein 3D for SDL (Zipit Z2 Port)
  ☆59Updated 7 years ago
• videogamepreservation / jediacademypc
  Star Wars: Jedi Knight - Jedi Academy (2003) by Raven Software Corporation
  ☆35Updated 12 years ago
• Blzut3 / CatacombSDL
  SDL 2 source port for Catacomb II.
  ☆34Updated 3 years ago
• icculus / Serious-Engine
  An open source version of a game engine developed by Croteam for the classic Serious Sam games.
  ☆171Updated 2 years ago
• videogamepreservation / descent2
  Descent II (1996) by Parallax Software Corp.
  ☆90Updated 12 years ago
• cyxx / f2bgl
  Fade To Black engine reimplementation (SDL, OpenGL)
  ☆78Updated 4 years ago
• CatacombGames / Catacomb
  Catacomb source code
  ☆145Updated 11 years ago