Daux.io is recommended for developers and small to medium-sized teams who need to generate and manage documentation efficiently without much overhead. It's especially suitable for projects that make extensive use of Markdown and are looking for an uncomplicated setup.
Doxygen - Generate documentation from source code
GitBook - Modern Publishing, Simply taking your books from ideas to finished, polished books.
DocFX - A documentation generation tool for API reference and Markdown files!
Docsify.js - A magical documentation site generator.
Natural Docs - Natural Docs is an open-source documentation generator for multiple programming languages.
MkDocs - Project documentation with Markdown.