Viral Loops - Viral Loops is a viral and referral marketing platform to launch ranking competitions, sweepstakes, pre-launch and referral programs.
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.
Referral Candy - Run a fully automated, customizable and easy to integrate referral program for ecommerce.
Sharingbuttons.io - Quickly generate social sharing buttons with a tiny performance footprint.
InviteBox - Acquire new customers with a social referral program. InviteBox is a flexible referral marketing solution that brings you new customers at no cost.
AddToAny - Share buttons by AddToAny, the universal sharing platform for websites and apps.