ImBatch - ImBatch is a batch image processor with a nice graphical user interface.
GIF Resizer - Create animated GIFs and resize GIFs too big to tweet!
DVDVideoSoft Image Convert and Resize - Free Image Convert and Resize is a compact yet powerful program for batch mode image processing.
SVGConverter - Free Online SVG converter software that converts your PNG, JPG/JPEG, BMP, TIFF, WEBP, PDF to SVG, AI, EPS, PDF.
Ralpha Image Resizer - High-speed image batch conversion tool
ResizePixel - Free image editor to crop, resize, flip, rotate and convert images online