Future Me - Send an email to your future self
Glympse - Glympse is the easy way to safely share your location in realtime. No sign-up needed.
Incubate - Time-delay messaging app
Zenly - Zenly is a GPS tracker to locate your friends in realtime.
Vuash - Send secret messages safely.
LockOnMe - LockOnMe is a location-sharing app, displaying targets and associated Points Of Interest on maps & fun radars.