State Counter
This free service offers an excellent way to keep track of your site's traffic and is easy to set up. StatCounter.com offers loads of detailed site stats and is highly configurable. The service lets you specific your counter's font, background color and digit color. An invisible counter option is also available.

Web State
This is a free service for analyzing traffic to your Web site. WebSTAT.com offers loads of info on your traffic that you can view with convenient, easy-to-read graphs and tables. Easy to set up: just put a snippet of code on your page and you're all set.

Cool Counter
This free Web site counter service offers a nice way for you to keep tabs on your site's traffic. The statistics offered here include: total visitors, unique visitors, search engine tracking, visitor forecasts, and more.

Hits log
This free Web site stats service offers loads of real-time data about your site's traffic. HitsLog's services include a hit counter, which you can opt to make invisible on your site's pages. Stats featured here include referring URLs and domains, search engine keyword analysis, system tracking and more.

Good Counter
A free Web page counter service that is easy to set up and is highly customizable. GoodCounter.com gives you many useful stats, including raw and unique hits, referral traffic stats, search engine keywords, platform/browser reports, and more.