software to find duplicate files

I used dupeGuru for two weeks and it's not the one I need. And one of my friends recommended me Cisdem DuplicateFinder, it is a nice duplicate file finder Mac for me to remove all duplicates on my MacBook Air.

While surfing App Store i found many apps to delete duplicate files and music files from mac book but mostly software are paid and you need to spend some dollar of amount to buy them. You can easily use Duplicate Finder and Remover Software to delete duplicate files.

I have not used dupeGuru myself, but other users have found it to be helpful:

http://www.hardcoded.net/dupeguru/

Ciao.