Website: http://www.edu20.org/
Free iPad app: http://itunes.apple.com/us/app/gather-education-classroom/id525319815?mt=8&uo=4&at=10l6SU
Website: http://gathereducation.com/
Website: http://edufire.com/
Google Apps for Education app: https://www.google.com/enterprise/marketplace/viewListing?productListingId=2533+17801526640510310430
Website: http://www.zoho.com/meeting/
Free iPad app: https://itunes.apple.com/app/oovoo-mobile/id428845974?mt=8&uo=4&at=10l6SU
Free iPhone app: https://itunes.apple.com/app/oovoo-mobile/id428845974?mt=8&uo=4&at=10l6SU
Free Android Phone app: https://play.google.com/store/apps/details?id=com.oovoo
Free Mac program: http://www.oovoo.com/Download.aspx?os=Mac
Free Windows program: http://www.oovoo.com/Download.aspx?os=Win
Facebook app: http://social.oovoo.com/call/fbapp.aspx
Google Chrome app: https://chrome.google.com/webstore/detail/oovoo-video-chat/nimgeceabhadboepjjddfhepideeilej
Free Android Phone app: https://play.google.com/store/apps/details?id=com.skype.raider&hl=en
Free iPad app: http://itunes.apple.com/us/app/skype-for-ipad/id442012681?mt=8&uo=4&at=10l6SU
Free iPhone app: http://itunes.apple.com/us/app/skype/id304878510?mt=8&uo=4&at=10l6SU
Free Mac program: http://www.skype.com/go/download
Free Windows program: http://www.skype.com/go/download
Website: http://skype.com/
Website: http://wiggio.com/
Free iPhone app: https://itunes.apple.com/us/app/wiggio/id424059394?mt=8&uo=4&at=10l6SU
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://screencast-o-matic.com/