One of oldest and smartest programs in its class
Pros & Cons:
CloneSpy is the one of the oldest programs in its class. It's certainly not the fastest, but it's definitely the smartest. You can specifically select what is to be scanned and this can include multiple drives, multiple folders, or just individual folders.
It has the ability to detect duplicates by CRC, by file name, by CRC and file name, and by file name and size. It will detect zero length files, and also throws up duplicates in a way that at least makes you think about what you are deleting. Click-happy users may find this latter feature an annoyance; to me it's a safety feature.
The program does not need to be installed but can be run from the executable so it's a good candidate for your USB Flash drive toolkit.
CloneSpy was reviewed by Gizmos Freeware on