OptiPNG is a free command-line tool (gui extensions are avalaible), that will help you optimize PNG files, to reduce their size to a minimum without losing significant (perceptible) information. ::More

Image Tuner is a simple and free program that will help you rename many images at once to get rid of standard naming patterns, resize them for uploading to social networks, phones and forums, ::More

PhotoBatch is a free program that will let you perform batch processing, format conversion and renaming of image files. Scripts of commands, including input and output setup, can be saved and ::More

StylePix is a free and small graphics editing program; you can use it to draw pictures, edit photos and more. StylePix stands for “Style Picture”. Features: Draw pictures (Brush, Spray, ::More

WildBit Viewer is a free (for personal use) image viewer with slide show and editing abilities. The interface is nice and easy to use, featuring a folder / file list and a thumbnail viewer. The ::More