I’ve set up Google Analytics for a website recently, to keep track of the visitor statictics. Free is hard to beat, after all.
What is even better is for mac users is a free widget called Dashalytics that allows you to keep track of the Google analytic reports, without you requiring to log in to the site ! So, by glimpsing your dashboard you can get an instant view of how your monitored website is doing, how many visitors, etc.
Real cool !