I just posted an article on eHow titled: How to Check Your Articles for Plagiarism before Publishing or Selling. The article describes four very useful sites you can use to check your articles to make sure you are not unintentionally plagiarizing another writer. They are also useful for checking your blog or website URL to make sure no one is plagiarizing you. If you publish articles on various sites, you can use these article checker sites to make sure no one is stealing your articles too. They are very useful tools that I think you will want to use.