SteamVR

SteamVR is currently available on Steam, for free. Launch it now* or visit its store page on (Browser | Steam*).
*Only works if Steam has been installed, please install Steam if you haven't already.
Steam Deck support status: Unknown - More info on ProtonDB

SteamVR is a suite of tools and services for VR including OpenVR, Chaperone, Compositor, Lighthouse Tracking, and more.

Links:

• SteamVR Community
• SteamVR Discussion Forum
• OpenVR API Documentation
• Reddit SteamVR