Counters and Trackers
The difference? Counters normally display your hits publicly and trackers do not.
123 Zebu Counter Over 50 styles to choose from
Web Site Reporter Provides lots of stats
Link Trakker Also provides lots of stats
SuperStats a good free tracker - gives you lots of info about your hits
Web Side Story Another good tracker. Their graphic looks good on your site and you'll probably get a few hits from their index of sites.
The Counter.com This free counter doesn't require you to display a banner. I use it for some pages where I don't have room to display a big banner.
Link Exchange Don't expect a lot of traffic. However, Link Exchange does provide you with good stats so it can double as a tracker.
Link Buddies another good banner exchange that shows your banner a little more than Link Exchange