Best tool for detect and report third party software licenses at your code.

Question

Hi. Does anybody know good tools for analyze and detecting third party code (or pieces of code) at own projects? For example, I use some code from Sun (CDDL) in my project and had copyrights, but other developers can get licensed code and put it into the project without copyrights and license information. What I want it's a tool that cat analyze my project and detect third party code. I know some:

• blackduck;
• protecode;
• palamida.

But maybe some opensource and free tools available?

Thanks for answers!