Waterpebble - Your little water saver
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.
Apple - Available on iOS
Markdown to PDF - Super simple way to get your markdown files to PDF
Blocks - Empowering designers to build great websites without writing a line of code. For web and OS X.
UnMarkDocs - Unleash the Power of Markdown to Write Better Product Documentation