ClippingMagic.com - Remove image backgrounds online. Make backgrounds transparent, white, etc. Edit, crop, rotate, fix colors, add shadows, all you need for great photos!
Caesium Image Compressor - Compress your pictures up to 90% without visible quality loss.
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.
Bg Eraser - Background Eraser on Mac and Windows.
ImBatch - ImBatch is a batch image processor with a nice graphical user interface.