VeeR VR - Global VR video community
Ramsophone - A generative art/music machine. (Be sure to refresh!)
VRChat - Create and play in virtual worlds with others
Tinkersynth - Create and purchase unique generative art
A.I. Experiments by Google - Explore machine learning by playing w/ pics, music, and more
Generative Art in Go - Learn the basics of algorithmic art with the Go language