Stealthy: Secret Messenger - Chat anonymously with friends & strangers
Courseroot - Biggest online course database on the web
Roomvine - Chatrooms for real life venues, neighborhoods and events
EduDo - EduDo is a video discussion platform
Jodel - What is Jodel all about? Jodel is the community that shows you what's happening in your area in real-time.
TeenUp - A learning platform designed for teens by teens