Firefox Source Docs
From MozillaWiki
Firefox Source Docs is a Mozilla-customized documentation hosting service based on the open-sourced free software documentation hosting platform Read the Docs, which in turn is based around the documentation generator Sphinx. It supports features including version support, PDF generation, and more. Read the Docs simplifies software documentation by building, versioning, and hosting of your docs, automatically. Treating documentation like code keeps your team in the same tools, and your documentation up to date.