PhotoReviewer is a photo management app that helps you to sort through your incoming photos from your digital camera (including raw images!).
Quickly view your photos and choose which ones are "keepers", sort them into different folders, view histograms, rename them sequentially, and more. PhotoReviewer belongs between your digital camera and iPhoto, weeding and sorting your photos before iPhoto gets bogged down by them. It also makes a great slideshow app!