Workona - A better way to work in the browser.
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.
Tab Manager Plus for Chrome - The only tab manager you'll ever need
Mochi - Write notes and flashcards with Markdown and study them with spaced repetition.
Toby - Better Than Bookmarks
Inkdrop - The note-taking app with robust Markdown editor, supporting macOS, Windows, and Linux.