Feel free to use for any torrent you like, but keep in mind that this tracker is mostly for experimental and research purposes, for an extensive compilation of public and open trackers that you can use and information about their reliability go to Trackon.
You can use the following addresses to add the tracker to your torrents or ntrack apps:
Powered by the public domain Atrack tracker for Google App Engine.
For any feedback you can contact me or join #bittorrent in irc.freenode.org
Note: For privacy and efficiency reasons, atrack does not (yet?) implement the `scrape` protocol and other non-essential BT features, so you wont see the number of seeders and leechers available in this tracker, this doesn't mean they aren't there, but atrack doesn't keep track (pun not intended ;)) of that information.
You can also find a list of known open and public trackers at Trackon.
This site is a cat-v.org production. - Because sharing is caring.