Low budget open-source Virtual Reality controllers
Vivid Engine 2 is an open source 3D Engine coded using C# and C++.
A VR puzzle game for Cardboard using Unity
Launch a twitch stream using Livestreamer
HOTSPOT for windows 10
XNA based game engine completely written in c#
http://tazimehdi.com
1st 3D game engine built in C# for .NET, Visual3D Engine's predecessor