What is the best app for identifying and removing duplicates from iPhoto Libraries/Pictures?

Re duplicates:

Some apps for dealing with duplicates in iPhoto

iPhoto Library Manager

Duplicate Annihilator

Decliner

iPhoto Duplicate Cleaner

Re: Faces:

A poster called lopezio claims the following will do the job:

This is how you can disable (turn off) Face detection, without deleting faces found so far (just in case you want to restart processing at another time):

1. Quit iPhoto

2. Open Terminal Application (Applications/Utilities/Terminal.app)

3. Type the following (exactly as is):

defaults write com.apple.iPhoto PKFaceDetectionEnabled 0

(then return)

4. - Start iPhoto - Faces stops getting on your nerves...

If you ever need to re-enable faces, just do the same again and replace the 0 with 1.

I've not tested this so I'd offer a significant warning to back up first and even if it does work then to be wary if you're updating or upgrading as it may have an impact there too.

What definitely works, and safely, is to upgrade to Aperture as that has an option to disable faces. Pay more get more options.

These applications will identify and help remove duplicate photos from an iPhoto Library:

iPhoto Library Manager - $29.95

Duplicate Annihilator - $7.95 - only app able to detect duplicate thumbnail files or faces files when an iPhoto 8 or earlier library has been imported into another.

PhotoSweeper - $9.95 - This app can search by comparing the image's bitmaps or histograms thus finding duplicates with different file names and dates.

DeCloner - $19.95 - can find duplicates in iPhoto Libraries or in folders on the HD.

DupliFinder - $7 - shows which events the photos are in.

iPhoto AppleScript to Remove Duplicates - Free

PhotoDedupo - $4.99 (App Store) - this app has a "similar" search feature which is like PhotoSweeper's bitmap comparison. It found all duplicates

Duplicate Cleaner for iPhoto - free - was able to recognize the duplicated HDR and normal files from an iPhone shooting in HDR

Some users have reported that PhotoSweeper did the best in finding all of the dups in their library: iphoto has duplicated many photos, how...: Apple Support Communities.

If you have an iPhone and have it set to keep the normal photo when shooting HDR photos the two image files that are created will be duplicates in a manner of speaking (same image) but there are only twp apps that detected the iPhone HDR and normal photos as being duplicates: PhotoSweeper and Duplicate Cleaner for iPhoto. None of the other apps detected those two files as being duplicates as they look for file name as well as other attributes and the two files from the iPhone have different file names.

iPLM, however, is the best all around iPhoto utility as it can do so much more than just find duplicates. IMO it's a must have tool if using iPhoto.