Squash 2 for Mac - The easiest way to compress and optimize images for the web
Image Resizer for Windows - Lets you resize images by right-clicking.
Resizing.app - Image resizing has never been so simple with free online resizing.app. Convert, optimize, resize images with ease and for absolutely free.
Icecream Image Resizer - Image resizer by Icecream Apps is a program to resize images fast and free. Windows version. Free Download.
EasyBatchPhoto - EasyBatchPhoto is a utility that lets you batch-compress, resize, and convert your photos.
DVDVideoSoft Image Convert and Resize - Free Image Convert and Resize is a compact yet powerful program for batch mode image processing.