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.

DeepLinkDispatch - A simple, annotation-based library for making deep link handling better on Android - airbnb/DeepLinkDispatch

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.

AdMob - Earn more from your mobile apps using in-app ads to generate revenue, gain actionable insights, and grow your app with easy-to-use tools.

Synonymful - Improve your vocabulary and communicate like a pro.

Chartboost - Chartboost is a leading mobile discovery and monetization platform and acts as the business engine for mobile games, enable video game developer to create customized interstitial and video ads, promote new games as well as swap traffic with one anot…