PrivTracker – Private BitTorrent tracker for everyone

PrivTracker allows to share torrent files just with your friends, nobody else. Unlike public trackers, it shares peers only within a group which is using the same Announce URL. It really works like a private tracker, but can be generated with one click of a button.

This could be actually useful for sending large files, not just Linux ISOs. The code is available on GitHub, so could be used as a self-hosted service as well.