Fast and Easy Duplicate Removal

Scans selected drives and directories for duplicates; detects folders with similar contents as well, not just the file level. Duplicates are then presented in greatest size to least so that the minimal number of deletions can result in the largest recovery of disk space. One can keep many, all, or none of the dupliates. Very convenient to use.

The only missing feature I see is the ability to select a preferred directory when presented with a lot of common choices.

Walt Stoneburner about Duplicate Detective: Cleaner