Python
Tooting from the Open Source Bridge session on Python Packaging, led by @brainwane
For overview and tutorials on current standards, see https://packaging.python.org/
Recommends Dustin Ingram's recent talk "Inside the Cheeseshop" for a history of Python's package repository over the years: https://www.youtube.com/watch?v=AQsZsgJ30AE
PyPI is the Python Packaging Index, pronounced like "pie pee eye."
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For distributing *applications*, rather than libraries, there's probably a post from dsufft about it on https://caremad.io
[which *might be* https://caremad.io/posts/2013/07/setup-vs-requirement/ but this editor isn't sure.]
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Other important side note:
Read 17776 for stories about sentient spacecraft: https://www.sbnation.com/a/17776-football
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The thing you use to *upload* to PyPI is `twine` https://pypi.org/project/twine/
(not to be confused with the tool for authoring interactive fiction)
There is a `test.pypi.org` to test your packaging / upload / distribution process before giving it to PyPI for real.
devpi is a thing you can use to host your own private package repository. https://pypi.org/project/devpi/
For a caching interface to the PyPI.org repository, see bandersnatch: https://pypi.org/project/bandersnatch/
Python
For background on what the Python Packaging Authority wants to do for package signing, see the 2016 PyCon talk on TUF from Ying Li and David Lawerence: https://www.youtube.com/watch?v=fDvO9jwXCV4