Quizzes for Pages - Quizzes for Pages is an application to create and share quizzes on your Facebook Page.
Eureka Surveys - Survey over 1 million people within minutes
Outgrow - Enabling marketers boost conversion with interactive, beautiful & viral quizzes/calculators.
Gotcha - User-centric analytics & triggers, driven by micro-surveys
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.
Boolean - Send single question yes/no surveys