Icons8 Background Remover - Quickly remove the background from any photo
EnTT - Header-only C++ game development library with innovative ECS (Entity-Component-System).
Trace by Sticker Mule - Remove the background from any image for free
EntityX - Fast, type-safe C++ ECS (Entity-Component System).
ClippingMagic.com - Remove image backgrounds online. Make backgrounds transparent, white, etc. Edit, crop, rotate, fix colors, add shadows, all you need for great photos!
Entitas - Entity Component System Framework for C# and Unity