Ultraleap SDK for Unity
A toolkit that helps developing/prototyping VR apps
API and runtime that allows access to VR hardware
Lua Virtual Reality engine
Google Cardboard XR plugin for Unity
Open source Cardboard SDK and samples
An in-browser implementation of JanusVR
Everything you need to build and deploy scalable realtime 3D apps
Augmented Reality for everyone, out of the world experiences
An Open source library that allows easy development of VR Applications