AskBot - Askbot enables users to create Q&A forums.
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.
The Answer Bank - The Answer Bank is the UK’s leading question-and-answer site.
Memrise - Learn a new language with games, humorous chatbots and over 30,000 native speaker videos.
OSQA - OSQA is the free, open source Q&A system you've been waiting for.
Busuu - Join the global language learning community, take language courses to practice reading, writing, listening and speaking and learn a new language. Learn English with busuu's .