ImBatch - ImBatch is a batch image processor with a nice graphical user interface.
Removal.ai - Create transparent background for any image using Removal.ai - The fastest, easy-to-use & free tool to automatically remove backgrounds online.
XnConvert - XnConvert is an easy image converter for graphic files, photos and images available on Windows...
remove.bg - Remove the background of any image 100% automatically
DVDVideoSoft Image Convert and Resize - Free Image Convert and Resize is a compact yet powerful program for batch mode image processing.
ClippingMagic.com - Remove image backgrounds online. Make backgrounds transparent, white, etc. Edit, crop, rotate, fix colors, add shadows, all you need for great photos!