Try this one out, I was very impressed with its compression, its free too
Description:
FastStone Photo Resizer is a free image Converter/Resizer intended to enable users especially digital camera owners to convert, rename, resize, crop, rotate, change color depth, add text and watermarks to images in a quick and easy BATCH mode. It supports major graphic formats including BMP, JPEG, JPEG 2000, GIF and PNG. Drag and Drop mouse operation is well supported.
http://www.download.com/FastStone-Ph...ml?tag=lst-0-1