Tracer is a free web-based service which offers a new type of website-analytics function. It tracks "what’s being copied from your website (including images)".
Besides keeping the logs, it also adds the "copied website’s" link to the information copied, which may help the content to spread in a better (than nothing) copyrighted way & to get new visitors.



Most importantly, the application helps analyzing which parts of the content is more copied & more important in the eyes of the visitors.
Usage is very simple. Just include a "one-line" script to the website to be tracked & that’s all.
P.S. Tracer is currently in beta status & accepts new accounts periodically.