ShareAccount - Share your account without giving out your password
Stealthy: Secret Messenger - Chat anonymously with friends & strangers
Wing-project.org - WING - Wireless Mesh Network for Next-Generation Internet
Bubi Chat - Location based anonymous chatting app
Callio by Netguru - Never miss a call from your client or prospect
Startups Anonymous - Anonymously ask questions and share stories. AA for Startups