OpenVR is an API and runtime that allows access to VR hardware from multiple 
vendors without requiring that applications have specific knowledge of the 
hardware they are targeting. This repository is an SDK that contains the API 
and samples. The runtime is under SteamVR in Tools on Steam. 

Documentation for the API is available in the wiki: https://github.com/ValveSoftware/openvr/wiki/API-Documentation

More information on OpenVR and SteamVR can be found on http://steamvr.com