DVDVideoSoft Image Convert and Resize - Free Image Convert and Resize is a compact yet powerful program for batch mode image processing.
SageThumbs - SageThumbs is a powerful shell extension allowing to preview enormous amount of image formats...
Batch Image Resizer - Resize, crop, shrink, flip, exif-rotate, convert, enhance, process multiple pictures and photos with professional software! 120+ Actions, 30+ Image Formats
MysticThumbs - MysticThumbs generates thumbnails of many image types not natively supported by Windows.
Ralpha Image Resizer - High-speed image batch conversion tool
Icaros - Icaros is a collection of lightweight, high quality, Windows Shell Extensions