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
Outgrow - Enabling marketers boost conversion with interactive, beautiful & viral quizzes/calculators.
GoodUI Evidence - People's A/B test results that show which UI ideas work best
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.
PreFlight - Preflight is an Automated Web Testing tool. Allows everyone to automate Web UI tests.