What's the best duplicate file finder?

[Archaea]

After reformating multiple times in the last 10 years and never really cleaning up my drives as good as I should I've got duplicate files, but don't want to take the time to look through everything!!!!! Any good recommended tools to find duplicates easily?

 

[Menelmarar]

Not specifically for duplicates...

However; I will share this bit of advice. If your trying to clean up space on drives, WinDirStat is an awesome free utility for analyzing file structure, and going through and seeing where most of your harddisk space is being eaten up.

 

[CableDude]

I have used Duplicate File Finder

 

[Archaea]

I used Duplicate File Finder to clear up about 15GB today of duplicate MP3's, papers, and videos, but there are TONS more. The duplicate file finder is very accurate, but slow and barebones! Any more advanced recommendations (IE take advanced of quad core/chose duplicate folder to delete rather than individual files?)