Duplicate filer deleter?

Does anyone know of a free software program that will find and delete duplicate photos that i have on my pc? I've tried a few free ones i found on google and you are required to pay for them all before you can delete the files they find.

Please help a brother out, thanks.

I use digital Volcano Duplicate cleaner. It's a free download, I run it every once in a while. Seems to work allright.

Thanks Smoke.