These are some interesting apps.
Free Mac program: https://prezi.com/desktop/
Free Windows program: https://prezi.com/desktop/
Website: https://prezi.com/
Google Chrome app: https://chrome.google.com/webstore/detail/prezi/acoonfmhnndodekhecidldfdjgooefpg
Free Android Phone app: https://play.google.com/store/apps/details?id=com.evernote
Google Chrome app: https://chrome.google.com/webstore/detail/pioclpoplcdbaefihamjohnefbikjilc
Mozilla Firefox extension: https://addons.mozilla.org/en-US/firefox/addon/evernote-web-clipper/
Free iPad app: http://itunes.apple.com/us/app/evernote/id281796108?mt=8&uo=4&at=10l6SU
Free iPhone app: http://itunes.apple.com/us/app/evernote/id281796108?mt=8&uo=4&at=10l6SU
Free Mac program: http://itunes.apple.com/us/app/evernote/id406056744?mt=12&uo=4&at=10l6SU
Apple Safari extension: http://evernote.com/download/get.php?file=SafariExtension
Free Windows program: http://evernote.com/download/get.php?file=Win
Website: http://www.evernote.com/
Website: http://www.ted.com/
Free iPad app: https://itunes.apple.com/us/app/ted/id376183339?mt=8&uo=4&at=10l6SU
Free iPhone app: https://itunes.apple.com/us/app/ted/id376183339?mt=8&uo=4&at=10l6SU
Free Android Phone app: https://play.google.com/store/apps/details?id=com.ted.android
Website: http://dictionary.com
Google Chrome app: https://chrome.google.com/webstore/detail/dictionary-by-dictionaryc/gikhgcaliglmioibbockkmjknfnepbdh
Website: http://www.billnye.com/
Free Android Phone app: https://play.google.com/store/apps/details?id=com.google.android.apps.docs
Google Chrome app: https://chrome.google.com/webstore/detail/google-drive/apdfllckaahabafndbhieahigkjlhalf
Free iPad app: https://itunes.apple.com/us/app/google-drive/id507874739?mt=8&uo=4&at=10l6SU
Free iPhone app: https://itunes.apple.com/us/app/google-drive/id507874739?mt=8&uo=4&at=10l6SU
Website: http://drive.google.com/
Free Android Tablet app: https://play.google.com/store/apps/details?id=com.google.android.apps.docs
Free Mac program: https://www.google.com/drive/download/
Free Windows program: https://www.google.com/drive/download/
Website: http://www.nationalgeographic.com/
Website: http://padlet.com/
Google Chrome app: https://chrome.google.com/webstore/detail/padlet-wallwisher/ppckapbnfhikdajgehibjapcohbaomhd
Free Android Phone app: https://play.google.com/store/apps/details?id=com.schoology.app
Free iPad app: https://itunes.apple.com/us/app/schoology/id411766326?mt=8&uo=4&at=10l6SU
Free iPhone app: https://itunes.apple.com/us/app/schoology/id411766326?mt=8&uo=4&at=10l6SU
Website: http://www.schoology.com/
Free Android Phone app: https://play.google.com/store/apps/details?id=com.visionobjects.calculator
Free iPhone app: https://itunes.apple.com/en/app/myscript-calculator/id578979413?mt=8&uo=4&at=10l6SU
Free iPad app: https://itunes.apple.com/en/app/myscript-calculator/id578979413?mt=8&uo=4&at=10l6SU
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
Free iPhone app: https://itunes.apple.com/us/app/nasa-app/id334325516?mt=8&uo=4&at=10l6SU
Free iPad app: https://itunes.apple.com/us/app/nasa-app/id334325516?mt=8&uo=4&at=10l6SU
Free Android Phone app: https://play.google.com/store/apps/details?id=gov.nasa