AD Picture Viewer is a fast, easy-to-use, compact image viewer. This viewer supports all popular graphic formats (BMP, JPEG, GIF/animated GIF, PNG, PCX, TIFF, TGA), and has a simple but powerful built-in file manager that allows you to copy, rename/move, delete images, set an image as a Windows desktop wallpaper, and rename multiple image files to create a series.
More info:
hxxp://www.abroaddesign.com/picview/index.html