I like Sphinx [0] with the MyST Markdown syntax [1]. There is a related project, Myst NB [2], which enables including Jupyter notebooks in your site. There is also a plugin for blogging [3].

[0]: https://www.sphinx-doc.org [1]: https://myst-parser.readthedocs.io [2]: https://myst-nb.readthedocs.io [3]: https://ablog.readthedocs.io