LINK TO SITE
This free site enables instructors to quickly build questions for real-time audience feedback via smartphone. The free version permits an unlimited number of questions and respondents. There are two free question types: single choice and open-ended questions. Several paid levels are also available.
Creating questions is fast and easy. The question creation feature is drag-and-drop; the site uses a dashboard to track of the questions you've written. Respondents go to a voting site and receive an ID code. Respondents can answer only once. Those answers are tabulated immediately and are available within seconds.