Blurt - Compose efficiently. Edit smartly. Stay on track. Blurt is all you need to write — in one sleek tool.
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.
Ulysses.app - A powerful writing tool for Mac, iPad, and iPhone
Markdown to PDF - Super simple way to get your markdown files to PDF
Haven - Personal space security app, backed by Snowden
UnMarkDocs - Unleash the Power of Markdown to Write Better Product Documentation