Lander - Lander is a powerful online tool to create Landing Pages.
Outgrow - Enabling marketers boost conversion with interactive, beautiful & viral quizzes/calculators.
FrontMeter - The internet's most powerful AnyPage™ builder
Quizzes for Pages - Quizzes for Pages is an application to create and share quizzes on your Facebook Page.
Pagewiz - An innovative landing page platform that lets you create, publish, and split-test landing pages.
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.