Chrome Experiments for Virtual Reality
Turn your smart phone into a virtual reality device using Google Chrome and Cardboard
It's still starting but it has great potential!
Best thing is it works on your iPhone and it's free!!!
There are 4 experiences in there right now: A game, a roller coaster, a space-thingy and an old school slide shop.
Want to develop browser-based Virtual Reality Experiences?
This website offers you the tools to do so: A WebGL and Java based code to program your own VRE and you can submit it to the website.