Mind map, Concept map (εννοιολογικός χάρτης)

• Hive Five: Five Best Mind Mapping Applications
  http://lifehacker.com/5188833/hive-five-five-best-mind-mapping-applications 
• Mind Mapping: Best Tools To Draw Your Own MindMaps - Sharewood Guide
  http://www.masternewmedia.org/mind-mapping-best-tools-to-draw-your-own-mindmaps/
• 30+ Mind Mapping Tools
  http://mashable.com/2007/11/03/mindmapping/
• Three Web-Based Mind Mapping Tools Reviewed
  http://gigaom.com/collaboration/three-web-based-mind-mapping-tools-reviewed/
• Mind Mapping Software
  http://www.mindmappingstrategies.com/mind-mapping-software.aspx

Ten techniques for mind mapping from Tony Buzan
Concept mapping - wikipedia
Mind mapping- wikipedia
Concept Mapping: A Graphical System for Understanding the Relationship between Concepts. ERIC Digest.