Jimp - Jimp is an image processing library written entirely in JavaScript for Node.
ImBatch - ImBatch is a batch image processor with a nice graphical user interface.
IMG.LY - Power Your Apps with IMG.LY | The Leading Provider of Design, Photo, and Video Editing SDKs
DVDVideoSoft Image Convert and Resize - Free Image Convert and Resize is a compact yet powerful program for batch mode image processing.
Pixolution - Pixolution is an AI powered visual search engine, with custom training for specific image collections.
Ralpha Image Resizer - High-speed image batch conversion tool