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.
W3Counter - W3Counter lists visits, referrals, browser versions, resolution, and operating systems used to view a site.
Histats - Start tracking your visitors in 1 minute!
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.
HitWebCounter - HitWebCounter is a free website visitor counter.
Matomo - Matomo is an open-source web analytics platform