This software is recommended for casual users and beginners who need to perform simple image conversion and resizing tasks and are looking for a free option. It’s particularly useful for people who frequently work with batch processing, as it offers an easy way to handle multiple files at once.
Optimage - Advanced image optimization tool
ImBatch - ImBatch is a batch image processor with a nice graphical user interface.
ImageOptim API - Web service for image compression
Batch Image Resizer - Resize, crop, shrink, flip, exif-rotate, convert, enhance, process multiple pictures and photos with professional software! 120+ Actions, 30+ Image Formats
Imagify - Optimize and resize images online and through your CMS.
Ralpha Image Resizer - High-speed image batch conversion tool