This free PLAGIARISM DETECTOR by Copyscape lets you check online whether anyone is using your copy on their websites without your permission.

All you do is enter the URL of the page you want to check into the Copyscape search box and check the results.

The layout if the site is very minimalist - rather like Google.

You can also download a warning banner to place on your site to warn off would be plagiarists.

This free plagiarism detector can also be supplemented with COPYSENTRY a paid plagiarism detector service which will monitor your entire site for a monthly fee and notify you of any infringements of your copyright.

All in all an unusual program which could be very useful indeed if you want to check that your copy remains your copy !