VisiPics - VisiPics does more than just look for identical files, it goes beyond checksums to look for similar...
PowerSchool - PowerSchool provides a K-12 education technology platform for operations, classroom, student growth, and family engagement.
dupeGuru - dupeGuru is a tool for finding duplicate files on your computer.
Clever - syncing between education applications for K-12 schools
Pixiple - Find images similar in pixel and/or metadata content
Claroline - Claroline is a collaborative eLearning and eWorking platform.