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.
Ablo - Say hello to the world
Clever - syncing between education applications for K-12 schools
RoomChat - No sign up chatrooms with just a URL and your handle
Claroline - Claroline is a collaborative eLearning and eWorking platform.
Chatterino - Chatterino is a chat client for twitch chat.