SupeResizer

SupeResizer can select a folder and the images and it does your batch process, can select one by one or the whole folder content, saves modified files in a subfolder OR saves with a different name OR overwrites the original files, and supports drag and drop. It makes images smaller, bigger, thumbnails with custom sizes, can give 'absolute width' and 'absolute height' values to make the image exactly at that size, and fills the space which would be created to maintain the aspect ratio with the color you choose.