Website: http://www.gooru.org/
Free iPad app: https://itunes.apple.com/us/app/gooru-collections/id576044892?ls=1&mt=8&uo=4&at=10l6SU
Google Apps for Education app: https://www.google.com/enterprise/marketplace/viewListing?productListingId=13045+661590233363337669
Website: http://lessonwriter.com/
Website: http://betterlesson.com/
Website: http://www.pbs.org/teachers
Website: http://www.discoveryeducation.com/
Website: http://learnzillion.com/
Website: https://www.vyond.com/
Paid iPad app: http://itunes.apple.com/us/app/collaborize-classroom-pro/id512701825?mt=8&uo=4&at=10l6SU
Free iPhone app: http://itunes.apple.com/us/app/collaborize-classroom/id497540468?mt=8&uo=4&at=10l6SU
Website: http://www.collaborizeclassroom.com/
Website: http://lessonopoly.org/