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.

Q-Stats - Get free marketing insights for every question on Quora.

Clicky - Clicky Web Analytics is a simple way to monitor, analyze, and react to your blog or web site's traffic in real time.

Site Rank Data - View historical rank information of websites via time series charts.

Matomo - Matomo is an open-source web analytics platform

Seoxan - check seo report for any website, alexa ranking, server information, meta tags, authority, page speed and more