I am looking for a tool to analyse the external dependencies of a set of classes. Here is a list of what I have found till now, but if you know others I will be happy to grow up the list:
- Java Dependency Smart Analyser
- Dependency Finder
- JDepend
- Ant Depend Task
- classdep – The Java Package Dependency Analyzer (seems quite dead [sigh/] )
.
Update: sometime later I will revisit this post and put some info about all the links (mines + those contributes – many thanks guys).
mindstorms 
You really have to try out the open xRadar project, it is just a collection of existing analysis plugins brought together in a very nice package with SVGs for modules, trends, metrics etc.
Excellent for getting your thoughts straight before refactoring etc.
http://xradar.sf.net
Thomas Roka-Aardal,
Conduct AS
Indeed from the 1st page it seems very interesting. Definitely I will give it a try (link: XRadar).
Here are the ones I know about when I was looking a while ago:
http://genjar.sourceforge.net/ http://sadun-util.sourceforge.net/pack.html
http://home.earthlink.net/~shvets/Programs/Tools/DependerTask/
http://jarpend.sourceforge.net/
Others:
http://pharos.inria.fr/Java/query.jsp?cids=c_2190
matt
I’m pretty impressed with the (free) Creole plugin for Eclipse – lets you visualize dependencies between packages, classes, and methods. I get kind of nauseous with the animated zooms though (fortunately you can turn that off).