Batch Image Resizer
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Full user review
"Does Exactly what it says it does"
Simple, lightweight. I don't need to open Photoshop for quick resizing and image editing. Also, making actions in photoshop takes a fair amount of time. This app it takes seconds, and it remembers all of my previous resizing settings.
I could see a better fit to box option.
If you need to resize images on the fly (like for web pages), this is the app for you.