Collabshot - Free web and desktop application that enables quick screen grabs, easy URL-based sharing, and live, multi-person drawing and sketching.
PowerSchool - PowerSchool provides a K-12 education technology platform for operations, classroom, student growth, and family engagement.
Nimbus Screenshot - Take screenshots and record video from your screen
Clever - syncing between education applications for K-12 schools
Greenshot - Greenshot is a free and open source screenshot tool that allows annotation and highlighting using the built-in image editor.
Claroline - Claroline is a collaborative eLearning and eWorking platform.