Voxer - Turn your phone into a Walkie Talkie. Don't waste time on phone calls and voicemails.

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.

Sameroom - Chat interoperability-as-a-service

Synonymful - Improve your vocabulary and communicate like a pro.

Chromacam - Chromacam is a tool that offers virtual green screen for web conferencing and presentations.

Fluent - Fluent is a people-based marketing platform that uses real-time, one-to-one interaction to create custom audiences and serve personalized ads that drive performance at scale.