[UPDATE] ImBatch v6.4.0October 4, 2019
ImBatch is a image processing tool with a very long list of accessible tools for modifying one or more files. Available options include rotate, resize, convert colors, metdata, PDF, blur, shadow, crop and much more. The program may also optimize pictures, add to an existing PDF, produce animations (GIF) and upload the results to your distant server.
Supports a wide assortment of formats, including command-line operations and batch activity settings for effortless load/unload of operations.