Markdown by DaringFireball - Text-to-HTML conversion tool/syntax for web writers, by John Gruber
txt2tags - It reads a text file with minimal markup such as **bold** and //italic// and converts it to the...
Typora - A minimal Markdown reading & writing app.
Texy! - Texy! is a lightweight markup language as well as converter of this format to XHTML, in a form of a...
StackEdit - Full-featured, open-source Markdown editor based on PageDown, the Markdown library used by Stack Overflow and the other Stack Exchange sites.
Asciidoctor - In the spirit of free software, everyone is encouraged to help improve this project.