CompendiumNG, is a powerful application that lets you create extensive and interactive maps using nodes and link structure. Common usages of CompendiumNG include: dialog mapping and mind mapping but its uses are almost limitless.
Ideas are represented as icons called nodes. There are ten types of node: question, answer, list view, map view, pro, con, note, decision, reference, argument. There are three types of relationship between nodes: associative, transclusive, categorical. Images can be placed directly into a view, assigned to a node, or assigned to the background picture.