Google Open Source - All of Googles open source projects under a single umbrella
DVDVideoSoft Image Convert and Resize - Free Image Convert and Resize is a compact yet powerful program for batch mode image processing.
Code NASA - 253 NASA open source software projects
ImBatch - ImBatch is a batch image processor with a nice graphical user interface.
Disney Open Source - Explore Disney's Open Source projects
Caesium Image Compressor - Compress your pictures up to 90% without visible quality loss.