W3Counter - W3Counter lists visits, referrals, browser versions, resolution, and operating systems used to view a site.
StatCounter - StatCounter is a simple but powerful real-time web analytics service that helps you track, analyse and understand your visitors so you can make good decisions to become more successful online.
HitWebCounter - HitWebCounter is a free website visitor counter.
AFSAnalytics - AFSAnalytics.
ShinyStat - ShinyStat is a web tracker with visits and online counter.
Woopra - Track your customers' web and mobile activity, forms, emails, support tickets and more, all in one place with customer analytics. Analyze and take action.