Crazy Egg

CrazyEgg is a nifty little tool, tracking and providing insights into the browsing activity of visitors to your sites. They describe themselves as like Ôa pair of X-ray glassesÕ, giving you a behind-the-scenes look at how people actually scroll, click and take action on your site. From this data, you can then extrapolate the optimum positioning for different assets on your page, so you can serve your visitors the information you want them to see most prominently in the places they want to look for it. The visual output makes CrazyEgg incredibly easy to use at a glance, so you make the changes your website needs as quickly as possible.

http://www.crazyegg.com/