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.
Livemocha - Livemocha is a web application that allows you to learn over 15 foreign languages free of cost.
Synonymful - Improve your vocabulary and communicate like a pro.
Bilingua - Bilingua: your language exchange app & learning companion.
Fluent - Fluent is a people-based marketing platform that uses real-time, one-to-one interaction to create custom audiences and serve personalized ads that drive performance at scale.
Mondly - Learn 33 languages in 500 bite-size lessons and 14 conversational modules.