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.
This was used in a class I took and I found it a fascinating tool to doing a poll or survey for a class. It allows students to use the tech that they generally already use to a great extent - such as responding by text from the phone using a code specific to that poll, responding via twitter, or on the PollEv.com site directly. I haven't integrated this yet into a class, but I can really see potential here after using it in a class
Poll Everywhere is the easiest way to gather live responses in any venue... conferences, concerts, classrooms, and company off-sites - anywhere with internet. We've been working to end 'death by PowerPoint' and raise the bar on presenting since 2008. More than 4,000 schools and 100,000 teachers poll with Poll Everywhere.