XnView MP is the enhanced version of XnView Classic. It is a powerful cross-platform media browser, viewer and converter.

ACDSee is an image organizer, viewer, and image editor programs for Windows, macOS and iOS.

ImageMagick is a free and open-source software suite for displaying, converting, and editing raster image and vector image files.

NessViewer is a software to edit, collect, present and stream media.

RawTherapee is a cross-platform raw image processing program, released under the GNU General Public License Version 3.

PhotoBulk is an easy-to-use batch photo editor. Watermark photos, Optimize and Rename photos at once.

XnConvert is a powerful and free cross-platform batch image processor, allowing you to combine over 80 actions.