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.
Markdown to PDF - Super simple way to get your markdown files to PDF
MWeb - Pro Markdown writing, note taking and static blog generator
UnMarkDocs - Unleash the Power of Markdown to Write Better Product Documentation
Loose Leaves for Mac - Instantly share what you write in Markdown