Image Tuner is a free tool to do various tasks in batches with your photos. Image Tuner can resize them, add watermarks or en masse rename them in JPG, BMP, PNG, TIFF and GIFF formats.
Image Tuner prepares the photos so you can upload them to the Internet or send them via email. It includes options for advanced configurations. Its interface is intuitive and simple to use. Image Tuner includes templates so you can work with images as they come out of an iPod, iPhone, Facebook, Twitter, DVD, etc.