NEO LMS is the BEST Learning Management System. I have never seen anything like NEO before.
schoology - An online learning, classroom management & social networking platform that provides educators & students w/ more effective, efficient & engaging ways to learn.
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.
Edmodo - Where Learning Happens
Clever - syncing between education applications for K-12 schools
Canvas by Instructure - The Canvas LMS is the world's fastest growing learning management system. Check out favorite features and schedule a live demo!
Claroline - Claroline is a collaborative eLearning and eWorking platform.