Interactive polling software. TurningPoint has established itself as a major player in audience response technology, so you'll find a lot of support for it at Penn. For instance, SAS Computing has standardized on the ResponseCard system from TurningPoint.
TurningPoint is under active development. They are now offering a product called "ResponseWare", which allows students to respond using a laptop or any web-capable smartphone.
Clickers can be reserved from the Vitale Digital Media Lab, using WebCheckout with pennkey access.
Availability
Available on Libraries computers
Tutorial
Vendor
Turning Technologies