Xee - Xee lets you easily browse and manage images on your Mac. Browse images within folders and archives, move and copy them right in the app.
Img.vision - Image hosting & video hosting for eCommerce sellers
CDisplay Ex - CDisplay Ex is the most used comic book reader.
UploadHouse - Thumbnail and resize your photos and images
IrfanView - IrfanView ... one of the most popular viewers worldwide.
ImageVenue - ImageVenue is a great online hosting service that allows uploading pictures for showing creative works with a simple-to-use technique.