pandoc - Pandoc is a Haskell library for converting from one markup format to another, and a command-line...
Markdown by DaringFireball - Text-to-HTML conversion tool/syntax for web writers, by John Gruber
Docutils - Docutils is an open-source text processing system for processing plaintext documentation into...
Asciidoctor - In the spirit of free software, everyone is encouraged to help improve this project.
mdbook - Gitbook alternative in Rust
Doxygen - Generate documentation from source code