For duplicates try Dupelss 2 from:http://www.pcmag.com/article2/0,1895,1864677,00.asp
For arranging files (the program allows twin comparisons), try Powerdesk from Vcom.com. This used to be non-shareware, but sadly no more. It's still worth the outlay, as it has great capabilities.
I'm trying to find a program or two that can help me organize the files on my computer. Right now I have to search with windows explorer and drag and drop into new folders. Also I need to find duplicate files, not just by name and type.
After using the desktop i'm on files have gone into different places. Also I backed up some on CD's and put them back onto the computer so there are duplicates i'm sure. I backed up laptop files, etc. So basically I have alot of files from different sources on my computer that are not very organized.