My tools I think help build and/or maintain communities
Website: https://www.google.com/apps/edu/
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/
Free iPhone app: https://itunes.apple.com/us/app/whatsapp-messenger/id310633997?mt=8&at=10l6SU
Free Android Phone app: https://play.google.com/store/apps/details?id=com.whatsapp
Website: https://web.whatsapp.com/
Free Android Phone app: https://play.google.com/store/apps/details?id=com.facebook.katana
Google Chrome app: https://chrome.google.com/webstore/detail/facebook-notifications/nmameahlembdcigphohgiodcgjomcgeo
Mozilla Firefox extension: https://addons.mozilla.org/en-US/firefox/addon/facebook-toolbar/
Free iPad app: https://itunes.apple.com/us/app/facebook/id284882215?mt=8&uo=4&at=10l6SU
Free iPhone app: https://itunes.apple.com/us/app/facebook/id284882215?mt=8&uo=4&at=10l6SU
Website: http://www.facebook.com/
Website: http://moodle.org/
Website: http://www.youtube.com/
Free iPad app: https://itunes.apple.com/us/app/youtube/id544007664?mt=8&uo=6&at=10l6SU
Free iPhone app: https://itunes.apple.com/us/app/youtube/id544007664?mt=8&uo=6&at=10l6SU
Free Android Phone app: https://play.google.com/store/apps/details?id=com.google.android.youtube
Free Android Tablet app: https://play.google.com/store/apps/details?id=com.google.android.youtube
Google Chrome app: https://chrome.google.com/webstore/detail/youtube/blpcfgokakmgnkcojhhkbfbldkacnbeo
Free Android Phone app: https://play.google.com/store/apps/details?id=org.wordpress.android
Google Chrome app: https://chrome.google.com/webstore/detail/wordpresscom-extension/pnbbfhcegldppmibabepjfjloachnmjb
Mozilla Firefox extension: https://addons.mozilla.org/en-US/firefox/addon/wordpress-dot-com/
Free iPhone app: https://itunes.apple.com/us/app/wordpress/id335703880?mt=8&uo=4&at=10l6SU
Website: http://wordpress.com/
Website: https://twitter.com/
Free iPad app: https://itunes.apple.com/us/app/id333903271?mt=8&at=10l6SU
Free iPhone app: https://itunes.apple.com/us/app/id333903271?mt=8&at=10l6SU
Free Android Phone app: https://play.google.com/store/apps/details?id=com.twitter.android
Free Android Tablet app: https://play.google.com/store/apps/details?id=com.twitter.android
Free Mac program: https://itunes.apple.com/us/app/twitter/id409789998?mt=12&uo=4&at=10l6SU
Free Android Phone app: https://play.google.com/store/apps/details?id=com.google.android.apps.plus
Google Chrome app: https://chrome.google.com/webstore/detail/google%20/dlppkpafhbajpcmmoheippocdidnckmm
Free iPad app: https://itunes.apple.com/us/app/google+/id447119634?mt=8&uo=4&at=10l6SU
Free iPhone app: https://itunes.apple.com/us/app/google+/id447119634?mt=8&uo=4&at=10l6SU
Website: http://plus.google.com/