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.

TiddlyMap - An interactive concept- and mind-mapping plugin for the personal note-taking software TiddlyWiki based on the Vis.js library. It's free and open-source!

Padlet - Visual boards for organizing anything.

Wisdomap - Wisdomap Medicine is a study aid that helps medical students create differential diagnoses and suitable management plans from a presenting complaint and structured revision notes.

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

IOctopus - IOctopus is an online mind map service for a dive deep into the mind for the best ideas.