Typora - A minimal Markdown reading & writing app.
Frost - An open API for Blockchain timestamping
iA Writer - Minimal Design, Maximum Focus
Lenote - Lenote is a simple, distraction-free notetaking app that lets you capture and organize thoughts more productively.
StackEdit - Full-featured, open-source Markdown editor based on PageDown, the Markdown library used by Stack Overflow and the other Stack Exchange sites.
Evernote - Bring your life's work together in one digital workspace. Evernote is the place to collect inspirational ideas, write meaningful words, and move your important projects forward.