ImBatch - ImBatch is a batch image processor with a nice graphical user interface.
Imagecompressor.io - Tool to compress jpeg & png images online.
DVDVideoSoft Image Convert and Resize - Free Image Convert and Resize is a compact yet powerful program for batch mode image processing.
Sirv - Dynamic image processing, hosting and rich-media for retailers and eCommerce.
Batch Image Resizer - Resize, crop, shrink, flip, exif-rotate, convert, enhance, process multiple pictures and photos with professional software! 120+ Actions, 30+ Image Formats
Mass Image Compressor - Mass Image Compressor is easy to use - a point and shoot batch image compressor and converter tool for Web site optimization, photographers, HTML game creator and casual Windows users.