AddThis - AddThis free website tools include share buttons, targeting tools and content recommendations help you get more likes, shares and followers and keep them coming back.
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.
Sharingbuttons.io - Quickly generate social sharing buttons with a tiny performance footprint.
Optimizely - A/B testing you'll actually use.
AddToAny - Share buttons by AddToAny, the universal sharing platform for websites and apps.
Smartlook - Qualitative analytics for websites and mobile apps Start understanding the 'whys' of your users' behaviors with clear, visual insights. With session recordings and event tracking, you get the complete picture.