https://pypi.org/project/sphinx
https://pypi.org/project/sphinxcontrib-applehelp
https://pypi.org/project/sphinxcontrib-devhelp
https://pypi.org/project/sphinxcontrib-htmlhelp
https://pypi.org/project/sphinxcontrib-jsmath
https://pypi.org/project/sphinxcontrib-jquery
https://pypi.org/project/sphinxcontrib-qthelp
https://pypi.org/project/sphinxcontrib-serializinghtml