Mihov Image Resizer is a useful tool for batch resizing images, it supports bmp, gif and jpg formats, no PNG support. Not only image resizing but this tool does some more things like converting images from one format to other and allows rotating of the images.
Image resizer allows you to select a list of images to resize, select the quality of the image and the pixel resolution to convert. If you want to rotate your digital camera photos that can be done using this app. it also allows you to create thumbnails from the images if you want to post them online.
It is useful if you are going to use all of its features other wise there are better tools for doing this. t can make images smaller or bigger. If you are just looking for just to resize images, Windows XP Power Toy and Power Toy clone for non-xp windows are better choices. Mihov Image Resizer is a freeware for windows