The best open source alternative to GitBook is BookStack, which is both free and Open Source. If that doesn't suit you, our users have ranked more than 25 alternatives to GitBook and many of them is open source so hopefully you can find a suitable replacement. Other interesting open source alternatives to GitBook are Read The Docs (Free, Open Source), Docusaurus (Free, Open Source), mdBook (Free, Open Source) and Sigil (Free, Open Source).
Easy Install and Upgrade. npm makes installation and upgrade a, trivial, single command activity. No need to modify your content during upgrades. Instant Publication.. Author and review content on your desktop, then publish via github pages with a single checkin.
A documentation generator that builds HTML output based on Markdown files. Supports Markdown specs and offers a wide set of custom components using Markdown-like syntax. Builds Reference Source documentation for .NET projects (more added soon).
NextBook is quick and easy way to buid technical books or documentation that support modern standards and run blazingly fast. It's built with MDX and Next.js and works by compiling markdown or MDX down to plain static html.