I think rather than going through the efforts of yet another migration, we should abandon the sphinx-contrib repository. The
The contrib repository will remain at the usual location, although some extension
developers have expressed a preferences for separate repositories. Therefore in
the future the main hub for extensions will be something similar to the survey
with links going to separate repos and PyPI entries where applicable.
There are also new PyPI classifiers for sphinx related packages:
Framework :: Sphinx
Framework :: Sphinx :: Extension
Framework :: Sphinx :: Theme
Once most package authors use them, a PyPI query is the easiest way to list all
available packages.