Bloat-free Graphical User interface for C++ with minimal dependencies
3D game engine/framework in C, with Luajit and Python bindings now
A modern, cross-platform Quake game engine based on FitzQuake.
An unmodified version of the MMORPG Impressive Title by KovuLKD
Arkham Development Open Source Projects
DOOM / Heretic / Hexen source port with enhanced graphics and UI
Cross-platform 2D and 3D game engine
Free MMORPG
C/C++ , PHP, PYTHON, 3D ENGINES, CHROME NATIVE CLIENT
Atari 2600, C64, Python, 3D engines and rock'n roll
starrydb is game server engine
PvP, MUD RPG.
3D Game Engine
Command Centre
A basic 3D environment with a first-person POV
3D game engine for C and C++
Beyond dreams is a 3d solo/mmorpg game currently in developement.