The Scenario Game - Scenario-based "would you rather" newsfeed
Outgrow - Enabling marketers boost conversion with interactive, beautiful & viral quizzes/calculators.
Go Fucking Do It - Set a deadline and a price. If you fail, you pay.
Quizzes for Pages - Quizzes for Pages is an application to create and share quizzes on your Facebook Page.
Decidr - Make better decisions with quick A/B polls
Poll Everywhere - Audience response system that uses mobile phones, twitter, and the web. Responses are displayed in real-time on gorgeous charts in PowerPoint, Keynote, or web browser.