SoliNav 2005 

Visual Studio.Net 2003 doesn't come out of the box with a good way to browse and navigate your code. SoliNav combines a file-oriented class view with a powerful context-sensitive navigation engine to help keep your mind focused on your object model.
visual studio.net add-in code navigator

Cavaj Java Decompiler 

Cavaj Java Decompiler is a graphical freeware utility that reconstructs java source code from CLASS files. You can decompile java applets, jar and zip files producing accurate java source code.
cavaj java decompiler decompile class file reverse engineer disassembler source recover decafe binary jar