XnConvert - XnConvert is an easy image converter for graphic files, photos and images available on Windows...
piZap - Free online photo editing software.
BatchPhoto - BatchPhoto is a batch photo editing software for Win and Mac that can convert, resize, annotate and watermark hundreds of photos in one go. Learn more and try it for Free!
FotoFlexer - FotoFlexer is the most powerful online photo editor in existence.
Batch Image Converter - Convert multiple images, photos, and pictures between 30+ formats: JPG, PNG, GIF, TIFF, BMP, JP2, J2K, TGA, PSD, RAW, DDS, PNM, WMF, ICO, SGI, HDR, LBM
Photoshop.com - Photoshop.