aTalk - An encrypted instant messaging with video call and GPS features for android.
Clever - syncing between education applications for K-12 schools
Talk360 - Talk360 is a best-in-class communication utility that offers a convenient way to connect with loved ones globally.
PowerSchool - PowerSchool provides a K-12 education technology platform for operations, classroom, student growth, and family engagement.
FluffyChat - Open. Nonprofit. Cute ?
Claroline - Claroline is a collaborative eLearning and eWorking platform.