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.
Gleam - Marketing apps designed to help you grow your Business
Sharingbuttons.io - Quickly generate social sharing buttons with a tiny performance footprint.
ViralSweep - Grow your fans and increase sales with sweepstakes and giveaways.
AddToAny - Share buttons by AddToAny, the universal sharing platform for websites and apps.
ShortStack - Shortstack is a website that allows you to create viral online events for your social media followers or other online audience.