Free Android Phone app: https://play.google.com/store/apps/details?id=com.google.android.gm
Google Chrome app: https://chrome.google.com/webstore/detail/gmail/pjkljhegncpnkpknbcohdijeoejaedia
Free iPad app: https://itunes.apple.com/us/app/gmail/id422689480?mt=8&uo=4&at=10l6SU
Free iPhone app: https://itunes.apple.com/us/app/gmail/id422689480?mt=8&uo=4&at=10l6SU
Website: http://mail.google.com/
Website: https://www.google.com/apps/edu/
Free Mac program: http://www.google.com/tools/dlpage/res/talkvideo/hangouts/
Free Windows program: http://www.google.com/tools/dlpage/res/talkvideo/hangouts/
Website: http://www.google.com/tools/dlpage/res/talkvideo/hangouts/
Google Chrome app: https://chrome.google.com/webstore/detail/google%2B-hangouts/kbpgddbgniojgndnhlkjbkpknjhppkbk
Website: http://www.symbaloo.com/
Free Android Phone app: https://play.google.com/store/apps/details?id=com.symbaloo.android
Free iPhone app: https://itunes.apple.com/us/app/symbaloo-bookmark-share-your/id521081559?mt=8&uo=4&at=10l6SU
Google Chrome app: https://chrome.google.com/webstore/detail/symbaloo/dfnbdccaiknlpdgabdgjijniolkgmoeh
Free Mac program: http://clic.xtec.cat/en/jclic/download.htm
Free Windows program: http://clic.xtec.cat/en/jclic/download.htm
Website: http://www.mindmeister.com/
Free iPad app: http://itunes.apple.com/us/app/mindmeister-for-ipad/id381073026?mt=8&uo=4&at=10l6SU
Free iPhone app: http://itunes.apple.com/us/app/mindmeister-mind-mapping/id291226775?mt=8&uo=4&at=10l6SU
Free Android Phone app: https://play.google.com/store/apps/details?id=com.meisterlabs.mindmeister
Google Apps for Education app: https://www.google.com/enterprise/marketplace/viewListing?productListingId=3435+15475579680845921511
Google Chrome app: https://chrome.google.com/webstore/detail/mindmeister/bdehgigffdnkjpaindemkaniebfaepjm
Free Android Tablet app: https://play.google.com/store/apps/details?id=com.meisterlabs.mindmeister
Website: http://www.slideshare.net/
Free Android Phone app: https://play.google.com/store/apps/details?id=com.scribd.app.reader0
Website: https://www.scribd.com/
Free iPad app: https://itunes.apple.com/us/app/scribd-books-audiobooks-magazines/id542557212?mt=8&at=10l6SU
Free iPhone app: https://itunes.apple.com/us/app/scribd-books-audiobooks-magazines/id542557212?mt=8&at=10l6SU
Free Android Tablet app: https://play.google.com/store/apps/details?id=com.scribd.app.reader0