Free iPad app: https://itunes.apple.com/us/app/teacherkit/id389584618?mt=8&uo=4&at=10l6SU
Free iPhone app: https://itunes.apple.com/us/app/teacherkit/id389584618?mt=8&uo=4&at=10l6SU
Website: http://www.jumpro.pe/
Website: http://www.livebinders.com/
Website: http://hapara.com/
Google Apps for Education app: https://www.google.com/enterprise/marketplace/viewListing?productListingId=5633+4297926092850388355
Website: http://rubistar.4teachers.org/