Future Me - Send an email to your future self
Fountain Greetings - Handwritten cards. Curated gifts. Right at your fingertips.
Dabble Me - Your own private place to write. A journal/diary to help you remember what's happened in your life.
Thankbot - Drive more business with handwritten notes
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.
Punkpost - Send handwritten cards as quick as texting