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.
Group Leaving Cards - Sign group leaving cards for colleagues from whole team
LanguageBeast.com - Study English synonyms and antonyms to enrich your vocabulary
Superdense - No text, just icons.
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 .
GreetPool - Group Greeting Cards