A mind map is a diagram used to visually organise information. A mind map is often created around a single concept, drawn as an image in the center of a blank landscape page, to which associated representations of ideas such as images, words and parts of words are added. Major ideas are connected directly to the central concept, and other ideas branch out from those.
Although the term "mind map" was first popularized by British popular psychology author and television personality Tony Buzan, the use of diagrams that visually "map" information using branching and radial maps traces back centuries.
Buzan suggests the following guidelines for creating mind maps:
Software Mind Map comparaison:
http://socialcompare.com/fr/comparison/list-of-free-mind-mapping-and-concept-mapping-softwares