freemind 0.7.1-6ubuntu4 (i386 binary) in ubuntu lucid

 Taking the Concept-Mapping approach to Human-Computer Interface design.
 A mind mapper, and at the same time an easy-to-operate hierarchical editor
 with strong emphasis on folding. These two are not really two different
 things, just two different descriptions of a single application. Often used
 for knowledge and content management.