Telegram - Telegram is a messaging app with a focus on speed and security. It’s superfast, simple and free.
PowerSchool - PowerSchool provides a K-12 education technology platform for operations, classroom, student growth, and family engagement.
Telegram X - Meet Telegram X for iOS and Android – two new official apps that offer more speed, longer batter life and smooth animations.
Clever - syncing between education applications for K-12 schools
WhatsApp - WhatsApp Messenger: More than 1 billion people in over 180 countries use WhatsApp to stay in touch with friends and family, anytime and anywhere.
Claroline - Claroline is a collaborative eLearning and eWorking platform.