If you've used javadoc and then come to doxygen, you may know what I mean when I say I miss the hierarchical (frame-based) view that made jumping from class to class and method to method easy. (For those who haven't seen it, imagine a tree-navigator in an IDE or over a filesystem).
Has anyone come across something more like that to view doxygen with?
A similar question was asked in October, but that was just about stylesheet alternatives and only one turned up. I think I'm looking for something more major.