PMD

Lately I came across PMD. Looks like a nice tool one should add to the toolbox, next to FindBugs and Clover. Looks like many of the things PMD will do for you Eclipse already does and most rules are not so useful. Still, I did find few things that made it worth while to use. the Killer feature I think is the 'duplicated code finder'. Its very good, and it did find few surprises over a very large code base. I did needed about 4Gig of heap to use it.