WhatsMany - Send personalised WhatsApp messages in bulk
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.
Text Blaster - Send thousands of text messages with one tap on Android
Sounter - Learning a language you never thought would be so easy! Sounter allows you to learn a language while listening to the songs you most enjoy,the app has several tools that allow you to learn everything of the songs.
Rocket for WhatsApp - WhatsApp marketing chrome extension
Upmind - Client management and billing for service businesses.