Visual Beat - Interactive music video
Stealthy: Secret Messenger - Chat anonymously with friends & strangers
Google Music Lab - Interactive experiments that use the Web Audio API
Roomvine - Chatrooms for real life venues, neighborhoods and events
SoundViz - Turn music and sounds into beautiful art
Jodel - What is Jodel all about? Jodel is the community that shows you what's happening in your area in real-time.