Fotosizer is a free batch photo/image resizer tool. It lets you resize hundreds of photos in a matter of minutes in a quick and easy way.
Choose to resize by percentage of width and height
Choose to set custom width and height
Maintain aspect ratio
Choose where the resized images will be saved
Change image quality
Parameterised output filenames: Choose the format of the output filenames using parameters such as new image width/height, current date, number of image in the list being resized.
"Auto-save" of settings on exit
Resize portrait and landscape photos at the same time.
Resize quickly and easily using a preset list of sizes including iPod, iPhone, and Sony PSP screen sizes.
Change Print DPI settings.