iConvert Icons - iConvert converts and creates Windows, Mac and Linux icons in one step.
XnConvert - XnConvert is an easy image converter for graphic files, photos and images available on Windows...
Faviconer.co - Create favicons from customizable text.
Phatch - Phatch = Photo & Batch!
Ordinatore - Those who want to tidy up their Macs will surely love this application.
FastStone Photo Resizer - Convert and Rename images in batch mode Support JPEG, BMP, GIF, PNG, TIFF and JPEG2000