Website: http://www.youtube.com/teachers
Free iPad app: https://itunes.apple.com/us/app/showme-interactive-whiteboard/id445066279?mt=8&uo=4&at=10l6SU
Website: http://www.showme.com/
Website: http://teachertube.com/
Website: http://www.opened.io/
Free iPad app: https://itunes.apple.com/us/app/opened/id756578913?mt=8&uo=4&at=10l6SU
Free Android Phone app: https://play.google.com/store/apps/details?id=com.opened.opened