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.
Optimizely - A/B testing you'll actually use.
Sharingbuttons.io - Quickly generate social sharing buttons with a tiny performance footprint.
Evergage - Evergage's real time web personalization software can help you boost engagement, increase revenue and drive more conversions. Web personalization software that's easy to use.
AddToAny - Share buttons by AddToAny, the universal sharing platform for websites and apps.
Qubit - Qubit is a web personalization platform founded by former Google workers, using innovative technology to collect, store, process, and output data to optimize consumers' experiences on the web. Read more about Qubit.