Construct Arcade - VR browser games platform.
WebVR Experiments by Google - Easily build and share VR experiences on the web!
Admix.in - Make money from your VR/AR content.
VeeR VR - Global VR video community
rumii - Collaboration and meeting software for Virtual Reality
Virtual Maker - Remove the complexities in building a VR web app, so you can design a higher quality experience.