Is your PC's hard disk clogged with massive photos? Then you'll want to give the free Photo Vacuum Packer a try. It reduces the size of photos without significantly affecting their quality, freeing up hard disk space. In addition, it hunts down duplicate photos and deletes them, to save even more space.
Photo Vacuum Packer is exceptionally easy to use. Tell the program to look in a folder that contains your photos. It then looks for duplicates, examining the actual contents of photos, not just file names, to find copies. It lists all duplicates, and will delete them if you want.
After that, Photo Vacuum Packer shrinks all the photos, giving you the option to choose whether you want to keep image fidelity as high as possible (which leads to larger files), or to be more aggressive, and shrink files even more. In my tests, on the more aggressive setting, it reduced seven photos by a total of 13 MB--from 18 MB down to 5 MB.
Although Photo Vacuum Packer does an excellent job, you may want to give FILEminimizer Pictures a try as well. I found that FILEminimizer shrank files more than Photo Vacuum Packer did. However, FILEminimizer is shareware and costs $35 to register, while Photo Vacuum Packer is free. So if you're looking for a free way to shrink photos, Photo Vacuum Packer is the way to go.