Or you could reply here.
You won't get such a thing as freeware. Any company providing such a thing would have to maintain a large database of articles to compare documents. Maintaining such a database would be expensive, and programmers making such a thing would make far more money selling it on to educational establishments than they would putting out as freeware and hoping to get by on donations.
( Noit happy baby orangutan, Tue 12 Jan 2010, 20:51, archived)