GitBook - Modern Publishing, Simply taking your books from ideas to finished, polished books.
Vrite - Open-source, headless CMS for technical content.
Docusaurus - Easy to maintain open source documentation websites
Docuie - Docuie provides the simplest hosted documentation platform. Affordable and beautiful, write documentation easily.
MkDocs - Project documentation with Markdown.
code_doc - Hosted documentation and artifacts server