iDeduper

For Windows
Easily find and delete duplicate songs on iTunes.




Dedupo

For Mac
Find and delete duplicate files on Mac.




iMDeduper

For Mac
Easily find and delete duplicate songs on iTunes
for Mac.




PhotoDedupo

For Mac
Easily find and remove duplicate photos on iPhoto




Photora

For Mac
Easily resize & watermark multiple images




Resizo

For Mac
Easily resize multiple images





Freeware:

Wallpaper Shuffler (Windows) - Shuffle your wallpaper.