Polarr Photo Editor 3 - The most powerful photo editor in the web.
Icons8 Background Remover - Quickly remove the background from any photo
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IMG.LY - Power Your Apps with IMG.LY | The Leading Provider of Design, Photo, and Video Editing SDKs
ClippingMagic.com - Remove image backgrounds online. Make backgrounds transparent, white, etc. Edit, crop, rotate, fix colors, add shadows, all you need for great photos!