Visual Understanding Environment - Visual Understanding Environment (VUE) is a mind-mapping and concept-mapping tool.
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.
Protégé - Protégé is a free, open source ontology editor and knowledge-base framework.
Minzel - Minzel is a beautiful and free mindmapping tool built for creatives and gives you the power to...
Flying Logic - Highly visual software for planning support used by strategists, process improvement specialists, teachers, and writers. Windows, Mac OS X, and Linux.
MyDraw - MyDraw is a powerful yet easy to use software for creating diagrams.