Duolingo - Duolingo is a free language learning app for iOS, Windows and Android devices. The app makes learning a new language fun by breaking learning into small lessons where you can earn points and move up through the levels. Read more about Duolingo.
TeenUp - A learning platform designed for teens by teens
Eduflow - Digital learning that actually teaches students something
Alcamy - Free, open self-learning platform. Learn & teach anything.
Backchannel Chat - Backchannel Chat is best in class discussion tool that is intended for teachers to streamline their class activities.
EduDo - EduDo is a video discussion platform