Jenkins - Jenkins is an open-source continuous integration server with 300+ plugins to support all kinds of software development
GitBook - Modern Publishing, Simply taking your books from ideas to finished, polished books.
CircleCI - CircleCI gives web developers powerful Continuous Integration and Deployment with easy setup and maintenance.
DocFX - A documentation generation tool for API reference and Markdown files!
Travis CI - Simple, flexible, trustworthy CI/CD tools. Join hundreds of thousands who define tests and deployments in minutes, then scale up simply with parallel or multi-environment builds using Travis CI’s precision syntax—all with the developer in mind.
MkDocs - Project documentation with Markdown.