ImBatch - ImBatch is a batch image processor with a nice graphical user interface.
Priime - Edit photos with the styles of the world's top photographers. Smart suggestions, fast editing, and inspiring collections.
DVDVideoSoft Image Convert and Resize - Free Image Convert and Resize is a compact yet powerful program for batch mode image processing.
Dark Room - A quick, powerful photo editor that gives you control
Ralpha Image Resizer - High-speed image batch conversion tool
Nizo - A better iPhone camera for shooting film