aTalk - An encrypted instant messaging with video call and GPS features for android.
Teachable - Create and sell beautiful online courses with the platform used by the best online entrepreneurs to sell $100m+ to over 4 million students worldwide.
Talk360 - Talk360 is a best-in-class communication utility that offers a convenient way to connect with loved ones globally.
Clever - syncing between education applications for K-12 schools
FluffyChat - Open. Nonprofit. Cute ?
Claroline - Claroline is a collaborative eLearning and eWorking platform.