TrinusVR - TrinusVR connects your Android phone to your PC so you can play your PC games in virtual reality.
X-Plane - The world's most advanced flight simulator just got an upgrade. Download the free demo today for Windows, macOS, & Linux.
VRidge - Play PC VR games inside your mobile VR headset.
FlightGear - The FlightGear flight simulator project is an open-source, multi-platform, cooperative flight simulator development project. It also simulates space flight in Earth's orbit. It's flight dynamics engine (JSBSim) is used in a 2015 NASA benchmark.
ALVR - ALVR is a software tool that connects your PC with a VR headset either via WiFi or USB cable.
Tom Clancy’s H.A.W.X 2 - Tom Clancy’s H.