Icy - Icy is an open community platform for bioimage informatics
ImBatch - ImBatch is a batch image processor with a nice graphical user interface.
ImageJ - and Other Health Care
DVDVideoSoft Image Convert and Resize - Free Image Convert and Resize is a compact yet powerful program for batch mode image processing.
JMicroVision - Image analysis toolbox: measuring and quantifying components of high-definition images
Fotosizer - Fotosizer is a freeware batch image resizer tool. It resizes your photos in just 3 easy steps - 1.