Free Android Phone app: https://play.google.com/store/apps/details?id=com.socrative.teacher
Free iPad app: https://itunes.apple.com/us/app/teacher-clicker-socrative/id477620120?mt=8&uo=4&at=10l6SU
Free iPhone app: https://itunes.apple.com/us/app/teacher-clicker-socrative/id477620120?mt=8&uo=4&at=10l6SU
Website: http://www.socrative.com/
Edmodo app: http://www.edmodo.com/publisher/socrative
Google Chrome app: https://chrome.google.com/webstore/detail/socrative-teacher/ofajgnplnindhnhnconjocimijjifaln?hl=en
Website: http://answergarden.ch/
Website: http://www.infuselearning.com/
Website: http://exitticket.org/
Website: http://getkahoot.com/
Free iPhone app: https://itunes.apple.com/app/apple-store/id1131203560?mt=8&at=10l6SU
Free iPad app: https://itunes.apple.com/app/apple-store/id1131203560?mt=8&at=10l6SU
Free Android Phone app: https://play.google.com/store/apps/details?id=no.mobitroll.kahoot.android
Free Android Tablet app: https://play.google.com/store/apps/details?id=no.mobitroll.kahoot.android
Website: http://letsgeddit.com/
Free Mac program: http://www.polleverywhere.com/macpresenter
Website: http://www.polleverywhere.com/
Website: http://quizalize.com/