ShortStack - Shortstack is a website that allows you to create viral online events for your social media followers or other online audience.
Quizzes for Pages - Quizzes for Pages is an application to create and share quizzes on your Facebook Page.
HubSpot Marketing Hub - HubSpot is a cloud-based inbound marketing software that allows businesses to transform the way that they market online.
Outgrow - Enabling marketers boost conversion with interactive, beautiful & viral quizzes/calculators.
Woobox - Woobox helps you easily create powerful contests, sweepstakes, coupons, and more to grow your fans...
doopoll - Create live, instant, editable polls effortlessly