Future Me - Send an email to your future self
PastPost - Send a letter to your future self
Dabble Me - Your own private place to write. A journal/diary to help you remember what's happened in your life.
Letter from You - Handwritten letter, mailed for you in the future.
Letter to Yourself - Send a physical letter to your future self
Postpone Pixel - Send a photo to yourself or a friend in the future