Typora
Free
Typora will give you a seamless experience as both a reader and a writer.
Byword
Commercial
Byword is simple and efficient text editor for Markdown.
Hemingway Editor
Commercial
Hemingway Editor is a proofreading tool for writers.
Haroopad
Open Source
Haroopad is a markdown enabled document processor for creating web-friendly documents.
ReText
Open Source
ReText: Simple but powerful editor for Markdown and reStructuredText.
Abricotine
Open Source
Abricotine is a markdown editor with inline preview.
Compare MacDown with alternatives
Compare Hemingway Editor and MacDown and decide which is most suitable for you.