Supercraft - Build VR Sites with Your Hands
VeeR VR - Global VR video community
AIFE for Virtual Reality - Launch a Virtual Reality experience (and more) in 60 seconds
VRChat - Create and play in virtual worlds with others
Virtual Maker - Remove the complexities in building a VR web app, so you can design a higher quality experience.
A.I. Experiments by Google - Explore machine learning by playing w/ pics, music, and more