VRidge - Play PC VR games inside your mobile VR headset.
Intugame - Intugame VR lets you play PC games in Virtual reality by using your smartphone and a Virtual...
Ottifox - Design & Prototype WebVR UI's & Themes
TrinusVR - TrinusVR connects your Android phone to your PC so you can play your PC games in virtual reality.
Gagagu VR-Streamer - Transfer the Image output from a game running on your Windows PC to your iPhone.
ALVR - Air Light VR - ALVR is an open source remote VR display for Gear VR and Oculus Go.