Caesium Image Compressor - Compress your pictures up to 90% without visible quality loss.
ImBatch - ImBatch is a batch image processor with a nice graphical user interface.
Batch Image Resizer - Resize, crop, shrink, flip, exif-rotate, convert, enhance, process multiple pictures and photos with professional software! 120+ Actions, 30+ Image Formats
Phatch - Phatch = Photo & Batch!
Namexif - Namexif is a free software to rename photos by date and time based on EXIF.
Batch Image Processor 2010 - Batch-process & create web gallery of images