Ralpha Image Resizer - High-speed image batch conversion tool
ThumbView - ThumbView enables image thumbnails and tooltips in Microsoft Windows XP Explorer (does not work on...
ImBatch - ImBatch is a batch image processor with a nice graphical user interface.
MysticThumbs - MysticThumbs generates thumbnails of many image types not natively supported by Windows.
Caesium Image Compressor - Compress your pictures up to 90% without visible quality loss.
Icaros - Icaros is a collection of lightweight, high quality, Windows Shell Extensions