A modern, cross-platform Quake game engine based on FitzQuake.
A standalone UQM mod made to enhance gameplay and visuals
3D Engine c++
A cross-platform port of Hexen II game.
Odamex is a free, cross-platform, modern client-server Doom engine
Zoomable user interface (ZUI) with file manager, file viewers and more
X3D is the open-standard format for 3D graphics scenes on the Web.
Game engine supporting many 3D/2D formats and graphic effects
A free 3d game for PC that does not limit the player. Fight,Build,Gain
General Purpose Engine for Graphic Adventures.
functions for 2D/3D graphics + realistic driving simulation
C++ lightweight cross-platform game engine
Spring is a free RTS engine developed for Windows, Linux and Mac OS X.
DOOM / Heretic / Hexen source port with enhanced graphics and UI
A fun realistic multiplayer free-and-open-source first-person-shooter!
Character animation system for games and simulations.
3D-Accelerated open-source DOOM engine
Build Cross-platform Applications