ImBatch - ImBatch is a batch image processor with a nice graphical user interface.
Icy - Icy is an open community platform for bioimage informatics
DVDVideoSoft Image Convert and Resize - Free Image Convert and Resize is a compact yet powerful program for batch mode image processing.
ImageJ - and Other Health Care
Ralpha Image Resizer - High-speed image batch conversion tool
JMicroVision - Image analysis toolbox: measuring and quantifying components of high-definition images