DVDVideoSoft Image Convert and Resize - Free Image Convert and Resize is a compact yet powerful program for batch mode image processing.
Shrink Me - Compress images with one drag / click
Ralpha Image Resizer - High-speed image batch conversion tool
TinyJPG - Compress JPEG images with perfect quality and file size
ImBatch - ImBatch is a batch image processor with a nice graphical user interface.
Watermark.ink - Online Photo Watermarker