DVDVideoSoft Image Convert and Resize - Free Image Convert and Resize is a compact yet powerful program for batch mode image processing.
ImBatch - ImBatch is a batch image processor with a nice graphical user interface.
Ralpha Image Resizer - High-speed image batch conversion tool
Fotosizer - Fotosizer is a freeware batch image resizer tool. It resizes your photos in just 3 easy steps - 1.
Caesium Image Compressor - Compress your pictures up to 90% without visible quality loss.
Phatch - Phatch = Photo & Batch!