for visualizing and modifying page structures
ComplexityMap, a tool for visualizing accidental complexity in large Java applications, has functionality for visualizing and refactoring Confluence pages. More information is available at: http://complexitymap.com/confluence.html.
The ComplexityMap source code has been released under GPLv3 license at: http://code.google.com/p/complexitymap.
Don't hesitate if you have any thoughts.