Future Me - Send an email to your future self
Journalistic - A simple, yet powerful micro journaling app
Dabble Me - Your own private place to write. A journal/diary to help you remember what's happened in your life.
Nomie - Open-source mood and life tracking
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.
Cactus - Static site generator for designers. Uses Python and Django templates.