Adobe Photoshop has an in-built feature for resizing photos in batch. Even though when people have Photoshop installed on their computer, they still look for other software to resize photos.
This tip works with Adobe Photoshop CS3 and Photoshop CS4. I’m not sure if this still works with Photoshop CS5 or any other Adobe product. If you have a folder of large photos, you can use Photoshop to resize them.