Using IrfanView to Edit Images
IrfanView is a free (for home and educational use) program that will edit graphic images. While it is not a complete graphic editor it will do the following:
view a directory of images as thumbnails
More importantly, if you need to perform the same function on a number of images it has a BATCH mode that can apply many of these functions to any number of images automatically. This is frequently used to change the resolution of a group of images that are destined for use in a web page. If the images were shot on a high resolution camera, IrfanView can convert all of the images to 640 x 480 resolution, for example, automatically. A VERY powerful tool!
IrfanView Home Page
DOWNLOAD HERE or from link above
Direct download of version 3.85
Sample images: (hold mouse cursor over image for information - double click image to see full size image)