workflow - What software is focused on reviewing and organizing images?

If I wanted to just view, sort, and organize (via tags or folders or both), what programs are geared toward doing this quickly?

I know I could do this in most any photo editor, but it's not ideal for reviewing hundreds of images. I've also seen people use the image previewers built into their computer's OS, but that can't be the best option either.

What program would you suggest instead?

Extra info on the program is appreciated, i.e. OS requirements and cost.