ImBatch - ImBatch is a batch image processor with a nice graphical user interface.
Material Icons Library - Free collection of 1000+ icons for design
DVDVideoSoft Image Convert and Resize - Free Image Convert and Resize is a compact yet powerful program for batch mode image processing.
Eva Icons - 480 Open Source icons for common actions & items
Batch Image Resizer - Resize, crop, shrink, flip, exif-rotate, convert, enhance, process multiple pictures and photos with professional software! 120+ Actions, 30+ Image Formats
Vivid JS - A highly customizable, open source SVG icons library