Telegram - Telegram is a messaging app with a focus on speed and security. It’s superfast, simple and free.

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.

Zenly - Zenly is a GPS tracker to locate your friends in realtime.

Babble - A more personalized social network

/Lunchbox - Coordinate lunch trips with colleagues and friends in Slack.

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