XnView MP - XnView is a free software that allows you to view, resize and edit your images. It supports more than 500 different formats!
remove.bg for Photoshop - Remove the background of any image 100% automatically
JPEGView - JPEGView is a small and fast viewer/editor for JPEG, BMP, PNG, GIF and TIFF images.
Garden Photo Frame - Garden Photo Frame: Photo Cut Paste Editor created and published by Solution Photo Apps.
IrfanView - IrfanView ... one of the most popular viewers worldwide.
Icons8 Background Remover - Quickly remove the background from any photo