polleverywhere.com

polleverywhere.com Poll Everywhere allows people in a room who have phones to vote on a topic by sending a code to a certain phone number. Pros:
 * No signup required
 * Can be voted on from phone or computer

Cons:
 * You need to sign up for some features
 * To have more than 40 people vote on your poll, you need to pay

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I give it five stars. = =  * * * * *