NationBuilder - The world's first platform for leaders, handcrafted from scratch to help you grow your community and lead them to action.
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.
Crowded Communities - The all-in-one community platform.
Clever - syncing between education applications for K-12 schools
Ning - Ning is the social platform for the worlds interests and passions online.
Claroline - Claroline is a collaborative eLearning and eWorking platform.