ImBatch - ImBatch is a batch image processor with a nice graphical user interface.
IcoFX - IcoFX is an all-in-one solution for icon creation, extraction and editing.
Batch Image Resizer - Resize, crop, shrink, flip, exif-rotate, convert, enhance, process multiple pictures and photos with professional software! 120+ Actions, 30+ Image Formats
Aseprite - Aseprite is an art program dedicated to the creation of pixel art.
Ralpha Image Resizer - High-speed image batch conversion tool
VistaCreate - The VistaCreate is a free and global digital platform which is known for sharing, searching, finding, and creating great art.