Java/JavaFX/Kotlin Game Library (Engine)
realistic driving simulation + functions for 2D/3D graphics
Vivid is a modern C++ 3D engine using OpenGL4+
photo3D_chung seashore3D_chung galaxy_chung dive3D_chung
Vivid Engine 2 is an open source 3D Engine coded using C# and C++.
Cross-platform 2D and 3D game engine
.NET wrapper for the Irrlicht Engine
XNA based game engine completely written in c#
Megalui: 2D/3D OpenGL & C/C++ Library for Scientific Visualizations
Game engine supporting many 3D/2D formats and graphic effects