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.
Proof - Website conversion rate optimization and visitor monitoring
Sharingbuttons.io - Quickly generate social sharing buttons with a tiny performance footprint.
Picreel - Recover abandoning visitors and turn them into customers
AddToAny - Share buttons by AddToAny, the universal sharing platform for websites and apps.
GetSiteControl - Website popup builder & email marketing suite for ecommerce