Duplicate removal software
 

Hi, I've been using NoClone 2010 free version for a couple of years now and wondered if anyone had tried anything different/more efficient/free?
I don't mind paying a reasonable price for good software but of course would prefer to find freeware by recommendation.
I find when cleaning up large numbers of photo files that NoClone (albeit it is the free version) has limitations on the smart marker and numbers able to be deleted at any one time.
I'm also put off buying NoClone by the limited time periods and additional installation software that appear to be involved.
Any recommendations welcome,
Dagwood