IrfanView
Irfan Skiljan
IrfanView is a fast and simple image viewer and editor that supports all major graphic formats, including BMP, DIB, JPEG, GIF, animated GIF, PNG, PCX, multipage TIFF, and TGA. In addition, it features drag-and-drop support, directory viewing, TWAIN support, slide shows, batch conversion, and modifications, such as color depth, crop, blur, and sharpen.
The latest version features a host of updates, including a zooming function for videos, new JPG Transformation dialog option, new "Browse Subfolders" dialog, when folder end/begin reached and an option to show EXIF data from TIF files.