Batch Image Commander 

Batch Image Commander is a batch image processor made for command line operation and as a System Tray Icon application for timer based operation.
command line jpeg resize timer-based batch processing prefix suffix thumbnails

AutoBatch It! 

AutoBatch It! v2 is a batch image processor made for command line operation and as a System Tray Icon application for timer based operation.
command line jpeg resize timer-based batch processing prefix suffix thumbnails