Open 3D Engine (O3DE) is an Apache 2.0-licensed multi-platform 3D
A game engine with an emphasis on real-time cutting-edge solutions
LDraw™ editor for LEGO® style digital building instructions.
Vivid3D is a C++ IDE/3D engine, with python scripting.
MIT Licensed Open Source version of Torque3D from GarageGames
Vivid is a modern C++ 3D engine using OpenGL4+
OpenGL port of the classic 6dof 3D shooter Descent
Improved version of the X-Ray Engine, the game engine
Vivid Engine 2 is an open source 3D Engine coded using C# and C++.
scriptable game engine with built-in support for 2D graphics and sound
Realtime 3D engine for game development
Mahasona engine is an open source game engine.
Multi-threaded 2D Renderer licensed under the Mozilla Public License
BxEngine For Marmalade And QT
3D world editor for game development
A 3D-Version of the famous 4 Wins or Connect 4 game