Oculus @ GDC 2015: https://www.oculus.com/blog/oculus-gdc-2015/

Oculus website: www.oculus.com

Oculus Connect 2015: https://www.oculus.com/en-us/connect/

Valve @ GDC 2015: https://steamdb.info/blog/valve-at-gdc-2015-recap/

HTC Vive: http://www.htcvr.com/

How Valve's Lighthouse Works: http://gizmodo.com/this-is-how-valve-s-amazing-lighthouse-tracking-technol-1705356768

Microsoft Kinect v2 for Windows: https://dev.windows.com/en-us/kinect

Unity 3D Development Software:  https://unity3d.com/get-unity

Story about upcoming immersive space game Earthlight; developed with Unreal Engine 4, for Oculus & Kinect v2: http://123kinect.com/gdc-2015-earthlight-announced-interview/50144/