PhotoPenguin App - PhotoPenguin is a completely free batch photo editor with support for cropping, resizing, adding watermarks, and converting photos to other formats. It works on the user's device, using the capabilities of modern browsers.
CompressJpeg - Reduce the size of your images and select up to 100 images .Jpg with 100 mb max .
Batch Image Resizer - Resize, crop, shrink, flip, exif-rotate, convert, enhance, process multiple pictures and photos with professional software! 120+ Actions, 30+ Image Formats
XnConvert - XnConvert is an easy image converter for graphic files, photos and images available on Windows...
ImBatch - ImBatch is a batch image processor with a nice graphical user interface.
DVDVideoSoft Image Convert and Resize - Free Image Convert and Resize is a compact yet powerful program for batch mode image processing.