Embedly - Embedly helps publishers and consumers manage embed codes from websites and APIs.
Quizzes for Pages - Quizzes for Pages is an application to create and share quizzes on your Facebook Page.
Microlink - Extract structured data from any website
Outgrow - Enabling marketers boost conversion with interactive, beautiful & viral quizzes/calculators.
Embed.rocks - Embed 'cards' (previews) into your app from other websites.
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.