Some of my photos look different because I was not careful with saving with or without color profile. Now I would like to be able to find out what color profile is used by an image. Is there a simple tool to see this? Hopefully a command line one? I'll try to pay attention next time!
Have you got Adobe Bridge or Lightroom? Bridge can sort by Colour Profile, but I cannot find a way to do it in Lightroom, though it must exist (if it does in Bridge). This will only work in Windows or on a Mac though.
Alternatively, in Windows the colour profile is reported as part of the image properties, so it would just be an entry in metadata. So I would guess it should not be difficult to write a script that queries the metadata for every image, but I am the wrong person to tell you how to do that.