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.

Gboard - Google-powered keyboard with search, GIFs, emojis and more!

Synonymful - Improve your vocabulary and communicate like a pro.

AnySoftKeyboard - Android (f/w 1.5+) on-screen keyboard for multiple languages.

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.

Fleksy - Fleksy is the #1 private, white-label virtual keyboard SDK, enabling companies to create unimaginable products.