Padlet - Visual boards for organizing anything.
Tomboy - Apps/Tomboy - GNOME Wiki!
Kids A-Z - Kids A-Z created and published by Lazel Inc.
Turtl - The secure, collaborative notebook
Quizalize - Quizalize is a leading web-based and mobile-based classroom application that delivers the best and easiest way to differentiates your teaching.
Carnet - Opensource rich text note taking app