We inherited some leagcy code that has a whole lot of code copy/pasted across projects. Is there a way to find these? PMD can do a single project
If you can put those projects into one Eclipse workspace, Codepro Analytix will happily consume all of them together: https://code.google.com/javadevtools/codepro/doc/index.html
Sonar is pretty neat to do this kind of thing. I really like all the indicators you can have...