The Tracker Checker 2 installer is small at just under 130kb. Needing the .NET framework to run, it installs pain-free in seconds and with a click of the shortcut, it’s ready to find those elusive no-invitation-required open signups on private trackers.
The software has a clear interface and comes with around 20 trackers pre-configured and ready to check. It can sit in your system tray silently checking for open signups and alerting you when they become available.
As you can see from the screenshot below, several sites are open for registration.





By simply clicking on the site in the list you wish to signup to, followed by the globe icon, an instance of your web browser is launched and you are taken directly to the new account page and you are ready to signup.
Although it’ll take some time to exhaust the content available on the pre-configured trackers, it’s inevitable that at some point you’ll wish to add new sites for the software to check and fortunately, this is fairly straightforward. Clicking the ‘Add’ icon brings up a box where one can enter various details;





Simply enter the tracker name for reference, followed by the site’s signup URL (commonly http://www.sitename.com/signup.php) followed by a text search string. On certain sites where one signs up to a forum, ‘Desired Username’ appears on the page when signups are open, so entering this into the ‘Find String’ box produces the desired results when the ‘Positive’ match button is clicked.
If for example the signup page currently says “signups are closed’, by entering this same text into the ‘Find String’ section but selecting ‘Negative’ match, you will notified when this text does not appear - i.e when signups are open.

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m8 we already have this thread about tracker checker...

I'm using the TrackerChecker .

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Member of HDbits.org , bit-HDTV , iptorrents , bitgamer, what.cd , BCG, TL , UG , demonoid , Waffles , BTMusic , ScL , ScC , Bitme , scenehd , filelist.org ...
Want to be a member of ScT , TT , E***o .
Please don't waste my time with fake offers and lying promises .

That's awesome, I'm going to get it right away!

interesting!!I'm gonna get it!thx

Applications such as this are pretty good in that they allow you to customize and add/remove trackers to check.
I personally use the Open Registration Checker for this sort of thing.
TEAM ROOTS Downloads
A new version of it has been announced in Jan '09.

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you can try BTRACS, seems nice,

Bittorrent TRackers Automatic Checking System - A.K.A BTRACS

but what if the site asks you to enter a captcha before you can check if the registrations are open?

looks pretty good, thanx for the info