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.
PowerSchool - PowerSchool provides a K-12 education technology platform for operations, classroom, student growth, and family engagement.
Zenkit - Zenkit is the home you always wanted for your ideas, your projects, your business.
Claroline - Claroline is a collaborative eLearning and eWorking platform.