MacDown is described as 'Open source Markdown editor for macOS, released under the MIT License. It is heavily influenced by Chen Luo’s Mou' and is a Text Editor in the news & books category. There are more than 50 alternatives to MacDown for a variety of platforms, including Mac, Windows, Linux, Web-based and iPhone apps. The best MacDown alternative is Typora. It's not free, so if you're looking for a free alternative, you could try ghostwriter or Marknote. Other great apps like MacDown are Ferrite, Hemingway Editor, Notepack and MarkFlowy.