Java/JavaFX/Kotlin Game Library (Engine)
3D Engine with Blender Integration
aka ogre v2 - scene-oriented, flexible 3D C++ engine
FlightGear Flight Simulator: free open-source multiplatform flight sim
3D Engine c++
GLScene Engine for Delphi & C++Builder VCL Windows 32/64
realistic driving simulation + functions for 2D/3D graphics
A real-time 3D Engine written in Ada
LDraw™ editor for LEGO® style digital building instructions.
Viewer and exporter for Unreal Engine 1-4 assets
Vivid is a modern C++ 3D engine using OpenGL4+
Cross-platform 2D and 3D game engine
Lightweight and modular C++11 graphics middleware for data and games
A real time global illumination solution that achieves glossy surfaces
CSG for jMonkey
Vivid Engine 2 is an open source 3D Engine coded using C# and C++.
A public domain cross platform 3D game
3D .NET engine for Windows, Linux, Mac
Design and Display Happy Cube solutions