Outgrow - Enabling marketers boost conversion with interactive, beautiful & viral quizzes/calculators.

Canny - Canny helps you collect and organize feature requests to better understand customer needs and prioritize your roadmap.

Quizzes for Pages - Quizzes for Pages is an application to create and share quizzes on your Facebook Page.

Delighted - The fastest and easiest way to gather actionable feedback from your customers

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.

Wootric - Wootric is software that allows apps and websites to take customer satisfaction surveys so that you can properly gauge the popularity and success of your app through the eyes of the people using it. Read more about Wootric.