StackEdit is a full-featured, open-source Markdown editor based on PageDown, the Markdown library used by Stack Overflow and the other Stack Exchange sites. Developed by Benoit Schweblin
License: Open Source
Both StackEdit and Mark Text are excellent Markdown editors, but they cater to different user needs. StackEdit is more feature-rich with collaboration and cloud integration, while Mark Text focuses on simplicity and ease of use, making it ideal for users looking for a straightforward writing experience.