Treebolic's purpose is to give a hyperbolic rendering of hierarchical data. A tree is rendered with nodes and edges but display space is subject to a particular curvature (hence the name). This module is the base module. Additional plugin modules provide access to different sets of data.
A toolkit (Treebolic Studio) is available for free at http://treebolic.sourceforge.net that allows one to build data (the application itself does not provide data beyond some samples).