Selenium - Selenium automates browsers. That's it! What you do with that power is entirely up to you. Primarily, it is for automating web applications for testing purposes, but is certainly not limited to just that.
Swetrix - Ultimate open-source analytics to satisfy all your needs.
Katalon - Built on the top of Selenium and Appium, Katalon Studio is a free and powerful automated testing tool for web testing, mobile testing, and API testing.
Statify - Statify provides a straightforward and compact access to the number of site views.
IBM Rational Functional Tester - IBM Rational Functional Tester provides automated testing capabilities for functional, regression, GUI and data-driven testing.
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.