Today, I will let you know about an awesome site which automatically checks whether the bittorrent trackers are open for registration at the moment or not.
BTRACS is an automatic information site which periodicaly checks closed community Bittorrent trackers for being open for signup. Some closed community Bittorrent trackers' signups are closed and are "invite only" (meaning, if you have a user, you can invite your friend to join or a friend can invite you). The main page refreshes every 10 minutes and shows a list of Bittorrent private trackers open for signup.
It is a pain in the neck to go over individual trackers to see if they are open for registration or not. So, you can simply visit this site which lists the trackers open for registration in two section; the one's which are rarely open and the one's which are open most of the time. There are lots of bittorrent trackers listed on the site, which you have never heard of. So, if you wish to join a particular site, make sure you look at the alexa rank (i.e. ranking) besides the site's link. The ones with the least number in the ranking are the most visited ones. So, there's a greater chance that the torrents available there are also alive.
You can also click on "Add Tracker" if you do not find the tracker you were looking for, listed there.