Edmodo: https://www.edmodo.com/
Blendspace: https://www.blendspace.com/
Blubbr: https://www.blubbr.tv/
Edcite: http://edcite.com/
Kahoot: https://kahoot.it/#/
PBWorks: http://www.pbworks.com/
Edpuzzle: https://edpuzzle.com/