Falcon - Ultraportable 2-in-1 Laptop
Typora - A minimal Markdown reading & writing app.
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.
Dillinger - joemccann has 95 repositories available. Follow their code on GitHub.
Editorial - Desktop-class text & markdown productivity on iOS
StackEdit - Full-featured, open-source Markdown editor based on PageDown, the Markdown library used by Stack Overflow and the other Stack Exchange sites.