Livemocha - Livemocha is a web application that allows you to learn over 15 foreign languages free of cost.
Mondly - Learn 33 languages in 500 bite-size lessons and 14 conversational modules.
Bilingua - Bilingua: your language exchange app & learning companion.
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.
My Language Exchange - Language Learning Community for Safe Effective Practice
Memrise - Learn a new language with games, humorous chatbots and over 30,000 native speaker videos.