I have used DupliChecker and Plagtracker. Perhaps these sites work well because I have never received duplicate or plagiarism warnings on my hubs. But I wonder if these sites actually catch plagiarism or duplicate contents.
sort by best latest
You can help the HubPages community highlight top quality content by ranking this answer up or down.
I found copyscape totally useless. Every search I tried brought up hundreds of other hubs because the program found lots of things that are identical on all the hubs:
Like This Hub?
Discover More Hubs
This Hub was last updated ..