The VolxEngine is a game engine, including 2D & 3D rendering, Lua script implementation, input, collision and particle systems. It's based on SharpDX (http://sharpdx.org/) and is intended to be a very fllexible game engine made from C#
Shade is an Object-Oriented, Shader-based, Distributed Scene Graph. Designed using C++ (with optional Lua bindings), OpenGL, and MPI, Shade allows the creation of applications that work on a single machine and on a tiled display.