ImBatch - ImBatch is a batch image processor with a nice graphical user interface.
Fotosizer - Fotosizer is a freeware batch image resizer tool. It resizes your photos in just 3 easy steps - 1.
DVDVideoSoft Image Convert and Resize - Free Image Convert and Resize is a compact yet powerful program for batch mode image processing.
Phatch - Phatch = Photo & Batch!
Ralpha Image Resizer - High-speed image batch conversion tool
Batch Image Processor 2010 - Batch-process & create web gallery of images