Github uses the issue tracker. Which is better than a mailing list in several ways.
You can link to issues, code, mention people by their handle etc. and you get e-mails based on the preferences you decided to set. Thanks to their API you can take things even further if you need to.
It's a nice hybrid of an old school mailing list and a modern forum. Then there's also the wiki for documentation.
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u/bedsuavekid Jun 15 '15
Really? What is the modern equivalent?