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.
SweepWidget - Run contests, viral giveaways, sweepstakes, leaderboard competitions, and instant rewards campaigns. Quickly grow your email list, social media followers, website traffic, and qualified leads.
AddToAny - Share buttons by AddToAny, the universal sharing platform for websites and apps.
Rafflecopter - Rafflecopter is a web app that makes it easy to run a giveaway promotion.