DVDVideoSoft Image Convert and Resize - Free Image Convert and Resize is a compact yet powerful program for batch mode image processing.
wxWidgets - wxWidgets: Cross-Platform GUI Library
Batch Image Resizer - Resize, crop, shrink, flip, exif-rotate, convert, enhance, process multiple pictures and photos with professional software! 120+ Actions, 30+ Image Formats
Electron - Build cross platform desktop apps with web technologies
Ralpha Image Resizer - High-speed image batch conversion tool
GTK - GTK+ is a multi-platform toolkit for creating graphical user interfaces.