Three Alternatives to Clicker Response Systems
Nintendo DS: An Assessment Tool?
ActivEngage
Interactive Classroom - Students can connect to your presentation by joining an Interactive Classroom session that you create using Microsoft Office 2007 or 2010
Mouse Mischief - a free student response system using wireless mice in the classroom.
Socrative - is a smart student response system that empowers teachers to engage their classrooms through a series of educational exercises and games via smartphones, laptops, and tablets.
Mobile Phone Response Systems - Scroll down towards the bottom of the page for using
10 Personal Response Systems Teaching Strategies
Question Press - Web-Based Classroom and Audience Response System