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!
Think like your computer and you can put files in order pretty quickly view it
IrfanView is a quick and easy way to create your own slideshow view it
You can create a Slideshow in Preview with just a few clicks of the mouse view it
Slideshow in Mac's Preview is a quick way to view your pictures view it
IfranView is a powerful free tool for batch converting image files. view it