GitBook - Modern Publishing, Simply taking your books from ideas to finished, polished books.
HelpCrunch Knowledge Base - Deliver instant answers to customers 24/7 with help articles
MkDocs - Project documentation with Markdown.
Slab - Slab is a knowledge hub for the modern workplace. We help teams unlock their full potential through shared learning and documentation. Slab features a beautiful editor, blazing fast search, and dozens of integrations like Slack, GitHub, and G Suite.
Docusaurus - Easy to maintain open source documentation websites
Intercom - Intercom is a customer relationship management and messaging tool for web businesses. Build relationships with users to create loyal customers.