FastStone Photo Resizer is an image converter and renaming tool that intends to enable users to convert, rename, resize, crop, rotate, change color depth, etc…

Image Tuner is a free batch image resizing, renaming, conversion and watermarking software with a super-intuitive and straightforward interface.

ImBatch is a batch image processing software.

Phatch (PHoto & bATCH) is a raster graphics editor used to batch process digital graphics and photographs. Phatch can be used on the desktop as a GUI program …

Light Image Resizer can resize and convert images one by one or in batch as well as other features.

GraphicsMagick is a utility of image processing.

ImageMagick is a free and open-source software suite for displaying, converting, and editing raster image and vector image files.

Kigo Image Converter helps you change between multiple types of picture files with the possibility to change size specifications.

Radical Image Optimization Tool (RIOT) is a free image optimizer that will let you to visually adjust compression parameters.