Confidential CC - Send self-destructing email without leaving a trace
Kaboom by Hotspot Shield - Share messages & photos that disappear on any social network
sup3rS3cretMes5age - A safe, simple tool for one-time (self-destructing) messages
Hamster Pad - A social network built on top of Slack
ShadowCrypt - Encrypts e-mails, Facebook status updates, tweets (Chrome)
Doof - Share your hopes and dreams.