CountAPI - CountAPI is a free counting service.
Google Analytics - Improve your website to increase conversions, improve the user experience, and make more money using Google Analytics. Measure, understand and quantify engagement on your site with customized and in-depth reports.
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.
flagcounter - Flag Counter is a free visitors counter for your webpage. Our service will allow you to track website traffic and visitors details. Its really simple and reliable counter!
Matomo - Matomo is an open-source web analytics platform
Free Hit Counter .Net - A free website hit counter.