FUJABA

I use this open source *free* tool "FUJABA - From UML to Java And Back Again" for a couple of years now. I found it really useful exporting java source directory and get a good class diagram. You can even export the class diagram into a jpeg file to include in your technical documentation or developer docs.I haven’t really explored all the options available with this tool, as the tool is improving every month. Looks like this product also offers a neat reverse engineering tool. Check it out...

FUJABA Link

Let me know what you think!