OpenStartup.dev - A collection of open startups

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.

Plezi - Plezi offers content marketing management software solution.

Heap - Analytics for web and iOS. Heap automatically captures every user action in your app and lets you measure it all. Clicks, taps, swipes, form submissions, page views, and more.

MailChimp - MailChimp is the best way to design, send, and share email newsletters.

Yandex.Metrica - A free tool for evaluating site traffic and analyzing user behavior