Compendium-TA is an outliner, a Graph Diagrammer, a cross-referencer, an entity modeller, a system prototyper, in short it is a flexible general purpose modelling tool.
For modelling what? Novels, Articles, WebSites, Systems. You can use it to track defects and requirements, generate html, generate test scripts, generate client side image maps, diagram systems, prototype.
Write your own extension in VB Script & make it even more useful.