Concept Maps are a similar visual tool to Mind Maps. They have similar advantages. I find them a little more restrictive for creative use, but users with stronger mathematical/logical intelligence may find them more comfortable to use. Concepts or ideas are enclosed in boxes and linked together. There is a  good piece of software available for non-profit and educational use, which can be downloaded by clicking here. It takes a little getting used to but is fine if you follow the useful Help guide which opens with the program. The site also explains fully the theory and practice of Concept Maps

Concept Maps

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Bryn Evans 2003