GitBook - Modern Publishing, Simply taking your books from ideas to finished, polished books.
Markdown by DaringFireball - Text-to-HTML conversion tool/syntax for web writers, by John Gruber
MkDocs - Project documentation with Markdown.
GitHub Flavored Markdown - GitHub uses "GitHub Flavored Markdown," or GFM, across the site--in issues, comments, and...
Docusaurus - Easy to maintain open source documentation websites
StackEdit - Full-featured, open-source Markdown editor based on PageDown, the Markdown library used by Stack Overflow and the other Stack Exchange sites.