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.

Todoist - Todoist is a to-do list that helps you get organized, at work and in life.

Clever - syncing between education applications for K-12 schools

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.

Claroline - Claroline is a collaborative eLearning and eWorking platform.

Remember The Milk - Remember The Milk is a task and time management application for mobile devices.