Understand, a simple tool that has become part of my daily routine. Its easy to use way of analyzing the code with the diagrams and navigational features for definition and declaration scores high on my list of tools for any code analysis. There have been instances where I have suggested other top modeling tool vendors in the market to incorporate the features of Understand as the Reverse engineering features.
In short, Great tool with Great Simplicity!!
System Engineer IIIHoneywell