Mind maps or graphic organizers can be invaluable tools for visual thinkers and visual learners. The process of creating a mind map can help students gain an overview perspective on complex, multifaceted concepts. Mind maps can also help students outline an essay or story they’re planning to write. The following list contains nine tools that can be used by students to create mind maps independently or collaboratively.
http://www.freetech4teachers.com/2010/03/nine-tools-for-collaboratively-creating.html