What does HackerNews think of chihaya?
A customizable, multi-protocol BitTorrent Tracker
Bolt (also here mentioned) is one of my favorite beautiful codebases. https://github.com/mdlayher is a prolific author with lots of good protocol implementations. https://github.com/chihaya/chihaya is a fun project if you're into BitTorrent.
Also, shameless plug -- I work on an open source BitTorrent tracker[1] that was adopted by Facebook for deploying their server software and have been playing around with a framework for writing tracker logic via middleware[2]. If you want to talk about any of the client <> tracker interactions, I'm totally down for discussion.
[0]: https://github.com/jzelinskie/move_torrents.py
TF run an article about it fairly recently. http://torrentfreak.com/private-anime-torrent-tracker-became...
I posted it here on HN before but it got no interest.