ATutor - Free, open source LMS with integrated social networking
PowerSchool - PowerSchool provides a K-12 education technology platform for operations, classroom, student growth, and family engagement.
Sublime Tutor - Learn Sublime Text from a tutor who sits inside the editor
Clever - syncing between education applications for K-12 schools
TutorMe - Connect with a high-quality tutor in under 30 seconds
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.