Trck.me - This site offers you several tools that are necessary to succeed in the traffic exchange world: rotators, trackers, etc. It is very easy to use and works very well, and they are constantly adding new features and improving the site.
If you are surfing without tracking, you are operating in the dark. When you are tracking your hits and your signups, it allows you to see which campaigns to keep and which ones to dump, and which TEs are producing results for YOUR pages, and which ones are not. So GETTING A TRACKER IS A MUST!