Labyrinth is a lightweight mind-mapping tool, written in Python using Gtk and
Cairo to do the drawing. It is intended to be as light and intuitive as
possible, but still provide a wide range of powerful features.

A mind-map is a diagram used to represent words, ideas, tasks or other items
linked to and arranged radially around a central key word or idea. It is used
to generate, visualize, structure and classify ideas, and as an aid in study,
organization, problem solving, and decision making.