Possibly the fastest batch image / photo converter around 
Photo Magician is a small and easy to use program that allows you to quickly scale and convert your images. It will enable you to easily process several files at once and create custom conversion profiles. The supported formats include common ones like BMP, GIF, JPG, PNG and TIF but the application can handles some that are more special like RAW images, DDS, PCX, PSD, TARGA, WBMP and WMF. 

Features: 

Convert images using pre-defined profiles 

Create custom profiles 

Resize images by pixel size or by percentage 

Include sub folders for image conversion 

Ability to overwite the original images 

Turn off image previewing during the conversion 

Exlude images under certain file size 

Exlude images under certain pixel size 

Convert all images to one image format 

Quick Convert Mode Allows you to drag images onto the hat to convert them quickly 

Support for popular images formats and others including DDS, TARGA, RAW, PCX 

Auto Updating 

Command line parameters supported 

Upload converted images to popular social sites or FTP