Phatch is a simple to use cross-platform GUI Photo Batch Processor which handles all popular image formats and can duplicate (sub)folder hierarchies. The app allows you to use EXIF and IPTC tags for renaming and data stamping. Phatch also supports a console version to batch photos on webservers.
RetroScan is a professional quality Photoshop plug-in that simulates the effect of rescanning a noisy TV signal.