Future Me - Send an email to your future self
Notion - All-in-one workspace. One tool for your whole team. Write, plan, and get organized.
Dabble Me - Your own private place to write. A journal/diary to help you remember what's happened in your life.
Obsidian.net - Obsidian is an Action-Adventure, First-person Exploration, Puzzle and Single-player video game created and published by Rocket Science.
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.
Evernote - Bring your life's work together in one digital workspace. Evernote is the place to collect inspirational ideas, write meaningful words, and move your important projects forward.