These are a few screenshots of goozzee running an imported topic map : Steve Pepper's Italian Opera Topic Map which is an excellent example of the power of topic maps.
Click on each screenshot to get a larger view and a description ... It's a mix of screenshots from both Linux, Windows and Mac versions.
Login screen
Main window
Main window showing how documents are stored
Main window showing the properties tab
Search window
Scope selection window
Association window
XTM Import window
XTM Export window