Pixillion - Easily convert photos and images between file formats in a batch or single file. Compress, rotate, resize, or add text and watermarks to any file. Free download.
Caesium Image Compressor - Compress your pictures up to 90% without visible quality loss.
Online Image Converter - Online Image Converter converts your BMP, JPG, PNG, GIF or ICO files quickly and easily.
XnConvert - XnConvert is an easy image converter for graphic files, photos and images available on Windows...
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.