Stealthy: Secret Messenger - Chat anonymously with friends & strangers
Future Me - Send an email to your future self
Notopass - Share your accounts without giving username/password
Letter to Yourself - Send a physical letter to your future self
ShareUrl - Share your accounts without giving out your password 🤫
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.