DVDVideoSoft Image Convert and Resize - Free Image Convert and Resize is a compact yet powerful program for batch mode image processing.
Fotosizer - Fotosizer is a freeware batch image resizer tool. It resizes your photos in just 3 easy steps - 1.
Ralpha Image Resizer - High-speed image batch conversion tool
Phatch - Phatch = Photo & Batch!
PhotoBulk - PhotoBulk is a bulk image editor for Mac that was created for the best experience of batch editing. With this image editing software for macOS you can add watermarks, optimize and resize pictures, convert images or rename photos in bulk.
XnConvert - XnConvert is an easy image converter for graphic files, photos and images available on Windows...