The following list contains currently freely available Markdown editors. Since things are constantly changing, I will update the list from time to time.
- Awesome Markdown Editors & (Pre)viewers by Mundi Mark
- 12 Best Markdown Editors for Linux from bettertechtips.com
- The Best Markdown Editor for Windows from sitepoint.com
- The Best Markdown Editors for Mac from sitepoint.com
- Top 7 Free and Open-source Markdown Editors for macOS from medevel.com
- List of different implementations of the markdown parser