Fastory (old name Kontest ) - Engage and qualify better with mobile-first
Quadruple Your Conversion Rates, with the most powerful & proven lead generator for sales - Contest Factory
Heyo: Social Giveaways and Promotions for Facebook, Twitter, Instagram ...
Random Picker - draw winners for raffle, giveaway or competitio
Tabfoundry | easy to use and incredibly powerful. Build quizzes, sweepstakes, games, photo contests or custom tabs
Socialshaker - Interactive marketing on Facebook, Mobile and Web