PixelFed - PixelFed is a federated image sharing platform, powered by the ActivityPub protocol.
Icons8 Background Remover - Quickly remove the background from any photo
Instagram - Instagram is a mobile, desktop, and Internet-based photo-sharing application and service that allows users to share pictures and videos either publicly, or privately to pre-approved followers.
ClippingMagic.com - Remove image backgrounds online. Make backgrounds transparent, white, etc. Edit, crop, rotate, fix colors, add shadows, all you need for great photos!
Belacam - Turn your Photos into Cash.
Bg Eraser - Background Eraser on Mac and Windows.