Smaller - Make your websites load faster
ImBatch - ImBatch is a batch image processor with a nice graphical user interface.
SE Ranking - All-in-One cloud-based SEO software for agencies, marketing teams and webmasters
Batch Image Resizer - Resize, crop, shrink, flip, exif-rotate, convert, enhance, process multiple pictures and photos with professional software! 120+ Actions, 30+ Image Formats
Screaming Frog - Screaming Frog is search engine marketing agency offering search engine optimisation and pay-per-click advertising services.
DVDVideoSoft Image Convert and Resize - Free Image Convert and Resize is a compact yet powerful program for batch mode image processing.