Paid iPad app: https://itunes.apple.com/app/ti-nspire/id590823242?mt=8&uo=4&at=10l6SU
Google Chrome app: https://chrome.google.com/webstore/detail/bhdheahnajobgndecdbggfmcojekgdko
Website: https://www.desmos.com/
Edmodo app: http://www.edmodo.com/publisher?uid=3382251
Free iPad app: https://itunes.apple.com/us/app/graphing-calculator-by-desmos/id653517540?mt=8&at=10l6SU
Free iPhone app: https://itunes.apple.com/us/app/graphing-calculator-by-desmos/id653517540?mt=8&at=10l6SU
Free Android Phone app: https://play.google.com/store/apps/details?id=com.desmos.calculator
Free Android Tablet app: https://play.google.com/store/apps/details?id=com.desmos.calculator
Free iPad app: https://itunes.apple.com/us/app/sketchpad-explorer/id452811793?mt=8&uo=4&at=10l6SU
Free iPad app: https://itunes.apple.com/us/app/geometry-pad/id517461177?mt=8&uo=4&at=10l6SU
Paid iPad app: https://itunes.apple.com/us/app/probability-tools/id544340525?mt=8&uo=4&at=10l6SU