“FindSame is an entirely new kind of search engine that looks for content, not keywords. You submit an entire document, and FindSame returns a list of Web pages that contain any fragment of that document longer than about one line of text.
Examples:
Documents with copied or plagiarized content
Outdated or updated documents
Copied and quoted press releases, information sheets, and websites
Resources or communities on a topic of interest
Source code and software in use”
You can also use it so see where some content is syndicated.”
08/04/01 update: “Digital Integrity is no more” but I don’t know when it happened.