GitHub Flavored Markdown - GitHub uses "GitHub Flavored Markdown," or GFM, across the site--in issues, comments, and...
Textile - Textile is a lightweight markup language originally developed by Dean Allen and billed as a...
Markdown by DaringFireball - Text-to-HTML conversion tool/syntax for web writers, by John Gruber
Typora - A minimal Markdown reading & writing app.
Groff - The groff (GNU troff) software is a typesetting package which reads plain text mixed with...
MarkMyWords - MarkMyWords is the ideal markup-writing tool for authors.