Socrative

http://www.socrative.com/

A web-based student response system.

Katrina Strauss's PowerPoint on Socrative

Pricing

Free - currently in beta

Devices

Works with web enabled smartphones, tablets and computers.
iPhone / iPad / iPod App
Android App

Web Access

Teachers login at t.socrative.com
Students login at m.socrative.com

Types of Questions

Multiple Choice
True / False
Short Answer

Results

Visable on teacher's screen
Can be downloaded as an .xls
Can be emailed as an .xls
Results are graded

My Room

metc2012

Sweet

Can poll audience or create a quiz.
Quizzes can be uploaded.
Quizzes can be saved.
Quizzes can be graded.
Results can be exported.
Free

Bummer

50 participants per activity (secondary).