Write.md - Sharable, distraction free markdown editor.
Markdown New Tab - Write notes in Markdown directly in the 'New Tab' page
Caret - Better Markdown Editor for Mac / Windows / Linux
NotesHub - Fully cross-platform, markdown based note-taking app
Mochi - Write notes and flashcards with Markdown and study them with spaced repetition.
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.