Outgrow - Enabling marketers boost conversion with interactive, beautiful & viral quizzes/calculators.
ThinkCool - Make better decisions
Quizzes for Pages - Quizzes for Pages is an application to create and share quizzes on your Facebook Page.
Tossup - An easier, faster way to make decisions with friends
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.
WhosDown - App where you can genuinely make friends—connecting with someone that shares a common interest