Apex Engine is a 3D game engine created in C#. It uses OpenTK for access to OpenGL functions. Has an intuitive scene editor and a material editor.

Supported features:

• Scene graph
• Supporting for loading OBJ and Ogre XML model formats
• Physics (thanks to Jitter Physics Library)
• Physically based lighting
• Cascaded Shadow mapping
• Post processing effects (such as SSAO)
• Dynamic/Procedural terrain
• Model/scene exporting in an xml format

And some more, however it's hard to remember on the spot...

Planned features:

• 2D support (I had it incorporated into the Java version, I just need the time to put it back together!)
• Mesh editing in the scene editor
• Material node editor
• More cool post processing effects such as screen-space reflections
• Collada (.dae) model support

Check out my blog for more in depth updates on the engine. http://apex-games.blogspot.ca