A modern, cross-platform Quake game engine based on FitzQuake.
Open and edit the archive files used in over 4200 games.
3D Engine c++
Odamex is a free, cross-platform, modern client-server Doom engine
A cross-platform port of Hexen II game.
GLScene Engine for Delphi & C++Builder VCL Windows 32/64
GemRB is a portable open-source implementation of the Infinity Engine
Air traffic control tower and radar simulator (solo + multi-player)
WW2 U-boat simulation
Hardcore 3D space shooter with spaceship upgrade possibilities.
0 A.D. is a free, open-source, cross-platform real-time strategy game.
kid-friendly retro point & click 3D OpenGL "adventure" game
Game engine supporting many 3D/2D formats and graphic effects
Zoomable user interface (ZUI) with file manager, file viewers and more
X3D is the open-standard format for 3D graphics scenes on the Web.
3D modeler, 3D game maker, 3D demo maker
LDraw™ editor for LEGO® style digital building instructions.
Cross-breeding a 3D FPS with a fantasy RPG in the world of Hexen