Notepin - Extremely simple note-taking + blogging ✍️
Future Me - Send an email to your future self
Buno - Simple Note Taking - Simple, minimal & easy note-taking
Dabble Me - Your own private place to write. A journal/diary to help you remember what's happened in your life.
QuickJots - Jot down quick notes and auto-save them with QuickJots. Use GitHub Flavoured Markdown to easily embed images, or even task-lists to track to-dos. It's private — all notes stay local; no login or downloads are needed. There's a dark mode too!
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.