Star Wars Spoiler Blocker - Chrome extension that warns about Star Wars spoilers
Letter to Yourself - Send a physical letter to your future self
Apester - Apester provides interactive units like Personality, Polls, Quiz and Videos to enhance content and boost engagement.
Future Me - Send an email to your future self
GOT Spoilers - Send GOT Spoilers via SMS
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.