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.

Alcamy - Free, open self-learning platform. Learn & teach anything.

Eduflow - Digital learning that actually teaches students something

EduDo - EduDo is a video discussion platform

Kialo - Kialo is the platform for rational debate. Empowering reason through friendly and open discussions.

Lrnkey - Lrnkey.com is a global online marketplace that easily connects you to live instructors and tutors across the planet.