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.

Quizalize - Quizalize is a leading web-based and mobile-based classroom application that delivers the best and easiest way to differentiates your teaching.

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

Popplet - Popplet is the simplest application to capture and organize your idea.