TotalFinder - TotalFinder is a plugin for Finder.app which adds tabs like in Chrome browser, dual panels similar to TotalCommander and more tweaks.
ImBatch - ImBatch is a batch image processor with a nice graphical user interface.
Path Finder - The Finder, reinvented. Path Finder is an award-winning file browser and management application for Mac OS X.
DVDVideoSoft Image Convert and Resize - Free Image Convert and Resize is a compact yet powerful program for batch mode image processing.
Forklift - The most advanced dual pane file manager and file transfer client for macOS.
Batch Image Resizer - Resize, crop, shrink, flip, exif-rotate, convert, enhance, process multiple pictures and photos with professional software! 120+ Actions, 30+ Image Formats