A Picture "Aspect Ratio" Application

Hi,

I'm looking for a Picture Aspect Ratio application that can give me a summary of all the Aspect Ratios of images in a folder.
(Small Education Course:
• High definition computer monitors have an Aspect Ratio of 16:9
• HDTVs usually have an Aspect Ratio of 16:10
• Remember old school computer monitors? The have an Aspect Ratio of 4:3
Great job, y'all passed the course! A++ for all!!)

So check this out. I have a folder that has a lot of wallpaper images for the computer. Yet many of their dimensions are different. For example: 2560x1440, 1920x1080, 1600x900, 1280x720.
(Education course again: If you simplify those numbers, you will get 16x9 for all of them; hence the Aspect Ratio of 16:9)

I want an app that will analyze all the Aspect Ratios of the images in the folder (not the dimensions), and tell me which images don't have a 16:9 Aspect Ratio.

Thanks!

Cool! That's exactly what I was looking for. I didn't think this application would exist, but it does! =D

Thanks for researching and finding it for me =)