Explorecams - Explorecams allows you to search through thousands of images that people taken on specific photo camera bodies & lenses.
ImBatch - ImBatch is a batch image processor with a nice graphical user interface.
Unsplash - Unsplash is a website with high-quality free HD images. It has a catalog of more than three hundred thousand striking images that are neatly organized with tags. Read more about Unsplash.
DVDVideoSoft Image Convert and Resize - Free Image Convert and Resize is a compact yet powerful program for batch mode image processing.
Pixabay - Over 270,000 free photos, vectors and art illustrations
Batch Image Resizer - Resize, crop, shrink, flip, exif-rotate, convert, enhance, process multiple pictures and photos with professional software! 120+ Actions, 30+ Image Formats