ColorSnapper - The missing color picker for Mac.
ImBatch - ImBatch is a batch image processor with a nice graphical user interface.
macOS - macOS High Sierra brings new forward-looking technologies and enhanced features to your Mac.
Batch Image Resizer - Resize, crop, shrink, flip, exif-rotate, convert, enhance, process multiple pictures and photos with professional software! 120+ Actions, 30+ Image Formats
ColorSlurp - Pick, edit, save, and copy colors. The best color picker in the universe!
Ralpha Image Resizer - High-speed image batch conversion tool