GitBook - Modern Publishing, Simply taking your books from ideas to finished, polished books.
Archivy - A self-hosted knowledge repository that allows you to safely preserve useful content that contributes to your own personal, searchable and extensible wiki.
Docusaurus - Easy to maintain open source documentation websites
MkDocs - Project documentation with Markdown.
VitePress - Vite & Vue powered static site generator.
ReadTheDocs - Spend your time on writing high quality documentation, not on the tools to make your documentation work.