MkDocs is a lightweight static site generator that creates documentation websites from markdown files. It offers simple configuration settings, fast build times and multiple theme options for creating professional-looking documentation.
Doxygen is a documentation generator tool that can be used to generate documentation in various formats (HTML, LaTeX, RTF, etc.) from source code comments using special syntax. It supports multiple programming languages including C++, Python, Java and more, and can also be integrated with other tools such as Graphviz for creating diagrams.