2016bestnine - Your best nine Instagram pics from 2016
Future Me - Send an email to your future self
The Twayback Machine - View your friends' old tweets for fun and trolling
Dabble Me - Your own private place to write. A journal/diary to help you remember what's happened in your life.
PastBook - PastBook is an online service that allows you to create your own beautiful photobooks and share them with friends and family.
Letter to Yourself - Send a physical letter to your future self