BookWidgets - BookWidgets is an excellent application that let you create engaging exercises in minutes and easily share a varied variety of beautiful and fun activities with your classroom and others.

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.

Padlet - Visual boards for organizing anything.

Clever - syncing between education applications for K-12 schools

Socrative - Socrative helps teachers engage the class with educational activities to measure and visualize...

Claroline - Claroline is a collaborative eLearning and eWorking platform.