CleanUp.Pictures - Quickly retouch any image from a browser, for free.
Trace by Sticker Mule - Remove the background from any image for free
Bg Eraser - Background Eraser on Mac and Windows.
PhotoRoom - Create studio-quality product pictures in seconds.
PixelFixer - iOS app to remove unwanted objects from photos
Removal.ai - Create transparent background for any image using Removal.ai - The fastest, easy-to-use & free tool to automatically remove backgrounds online.