Todoist - Todoist is a to-do list that helps you get organized, at work and in life.
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.
Trello - Infinitely flexible. Incredibly easy to use. Great mobile apps. It's free. Trello keeps track of everything, from the big picture to the minute details.
Clever - syncing between education applications for K-12 schools
Zenkit - Zenkit is the home you always wanted for your ideas, your projects, your business.
Claroline - Claroline is a collaborative eLearning and eWorking platform.