CMap Tools (http://cmap.ihmc.us/conceptmap.html) is a concept mapping freeware utilized as a visual learning tool used to organize, present, and share knowledge.

CMap tools allows learners to look at the relationships between concepts and understand them as part of understanding a single concept. The software encourages collaboration and allows users to share ideas and to make comments. This process provides interactive learning among students of all different types and levels (http://en.wikibooks.org/wiki/Transformative_Applications_in_Education/CmapTools)

CmapTools