Shapr - A completely free way to build your professional network.

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.

Intch - Professional networking app

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

Sporty - Beautiful app for creating/joining sports activities nearby

Babble - A more personalized social network