Aerial Bold - A word processor written with satellite imagery
Future Me - Send an email to your future self
Aerial - A beautiful aerial screensaver for your Mac
Letter to Yourself - Send a physical letter to your future self
JWildfire - Modern ui, soft developed and ugraded by andreas maschke for design 2d and 3d fractal flames. Very nice app and powerful.
Letterflix - Send letters and snail mail online to the USA, Europe, India, or anywhere in the world. Letterflix is the easiest and secure way to send letters and snail mail anywhere in the world from the comfort of your home.