Natural Docs VS PageHub

Doxygen - Generate documentation from source code

ReadTheDocs - Spend your time on writing high quality documentation, not on the tools to make your documentation work.

DocFX - A documentation generation tool for API reference and Markdown files!

GitBook - Modern Publishing, Simply taking your books from ideas to finished, polished books.

NDoc - NDoc generates class library documentation from .

Sandcastle - Sandcastle produces accurate, MSDN style, comprehensive documentation by reflecting over the source...