MirrorFly - World's Most Scalable Voice, Video & Chat SDK for Small, Medium & Enterprises

Synonymful - Improve your vocabulary and communicate like a pro.

echofin - Echofin helps communities grow, engage and monetize their following in ways no other platform has done so far.

Reji - Improve your vocabulary hassle-free 📚

chatwee - Group chat app for online communities. Used wherever visitor interaction and engagement are key to the site's functioning.

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.