Cocos simplifies game creation and distribution with Cocos Creator
N64 Game-Engine and Editor using libdragon & tiny3d
Free game engine for development of desktop, mobile, and web games
scene-oriented, flexible 3D engine (C++, Python, C#, Java)
Multi-platform Engine for Desktop, XBOX (UWP) and Mobile games
Cross-platform 2D and 3D game engine with modular architecture
Game/Scene Development System
OgreWin3D
LDraw™ editor for LEGO® style digital building instructions.
Synthetic Vision/Sectional Maps for experimental aircraft.
MIT Licensed Open Source version of Torque3D from GarageGames
Out battleship is back. Destroy everything in the space!
Vivid is a modern C++ 3D engine using OpenGL4+
3D C++ Game Engine - yet another open source game engine
Vivid Engine 2 is an open source 3D Engine coded using C# and C++.
Have fun with a variety of Christmas Snow Scenes
The Atomic Game Engine is a multi-platform 2D and 3D engine
Open-source, cross-platform, C++ game engine for creating 2D/3D games
Mahasona engine is an open source game engine.
Cross platform 2D/3D game engine written in C++11 & OpenGL ES 2/3
3D Game engine
BxEngine For Marmalade And QT