digiKam - Professional Photo Management with the Power of Open Source
Trace by Sticker Mule - Remove the background from any image for free
XnView MP - XnView is a free software that allows you to view, resize and edit your images. It supports more than 500 different formats!
PhotoRoom - Create studio-quality product pictures in seconds.
ACDSee Photo Studio - ACDSee becomes ACDSee Photo Studio — ACDSee Photo Studio Standard 2018 continues the ACDSee legacy
Removal.ai - Create transparent background for any image using Removal.ai - The fastest, easy-to-use & free tool to automatically remove backgrounds online.