Online Convert - Convert files like images, video, documents, audio and more to other formats with this free and fast online converter.
ImBatch - ImBatch is a batch image processor with a nice graphical user interface.
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.
XnConvert - XnConvert is an easy image converter for graphic files, photos and images available on Windows...
FileStar - With FileStar you can "do anything with any file".
DVDVideoSoft Image Convert and Resize - Free Image Convert and Resize is a compact yet powerful program for batch mode image processing.