Free Technology for Teachers: Mentimeter - Poll Your Audience | The 21st Century | Scoop.it
From www.freetech4teachers.com (via @dbhasin) - February 12, 2012 9:13 AM

Socrative is currently my favorite tool for using cell phones, tablets, and laptops to survey an audience. After the webinar I was contacted by a company called Mentimeter who offers a similar product.