Whimsical Sticky Notes - Visual project management using sticky notes
NotePlan - Make plans inside an individual markdown note for every day in your calendar. Use it as a journal for your daily tasks and plan todos in advance. For Mac, iPhone and iPad.
Jot - The no-fuss way to take notes
Mochi - Write notes and flashcards with Markdown and study them with spaced repetition.
Gone - An ephemeral to-do list
Inkdrop - The note-taking app with robust Markdown editor, supporting macOS, Windows, and Linux.