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.

LanguageBeast.com - Study English synonyms and antonyms to enrich your vocabulary

Babble - A more personalized social network

Wordup - Wordup CLI is an open-source development toolkit for setting up and managing your local WordPress theme or plugin development

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 .