Letter to Yourself - Send a physical letter to your future self
WhiteAlbum - A disposable camera on your phone, printed & shipped to you
Future Me - Send an email to your future self
Gudak Cam - Disposable film camera in your iPhone
Letter to my future self - Letter to my future self is a prominent email scheduling service that gives you the opportunity to create a letter with goals and thoughts for your future self and schedule a date for sending it.
Disposable Camera App - A roll full of surprises, printed and shipped for $12.99