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 feedback email uriel@berlinblue.org or join #bittorrent in irc.freenode.org
Note: For privacy and efficiency reasons, atrack does not (yet?) implement the `scrape` protocol, 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.