Find Websites that are Copying your Content

Copyscape is one of the more popular plagiarism detection tools that helps you identify other web sites that may have copied your content without permission. Simply enter your web address and Copyscape will try to find other pages on the web that have either lifted your content verbatim or have modified it slightly to make it look original.

http://www.labnol.org/internet/check-online-plagiarism/18120/