Text Message (SMS) Polls and Voting, Audience Response System (ARS), PowerPoint Polling | Poll Everywhere
Poll Everywhere replaces expensive proprietary hardware-based response systems with standard web technology. It's the easiest way to gather live responses in any venue: conferences, presentations, classrooms, radio, tv, print — anywhere. It can help you to raise money by letting people pledge via text messaging. Its simplicity and flexibility are earning rave reviews.