Stealthy: Secret Messenger - Chat anonymously with friends & strangers
Ruffle - An open source Flash player
Roomvine - Chatrooms for real life venues, neighborhoods and events
Write.as - Publish a thought in seconds
Jodel - What is Jodel all about? Jodel is the community that shows you what's happening in your area in real-time.
Lightspark - The Lightspark project