Unreal's Niagara has a visual editor. While it is packaged as an VFX/particle editor, it is in many ways an ECS. Each particle can have custom data structure an

Unreal's Niagara has a visual editor. While it is packaged as an VFX/particle editor, it is in many ways an ECS. Each particle can have custom data structure and modules/systems that drive them. Under the hood the graphs are translated to SIMD-optimized VM bytecode when run on CPU. It can even support translation to HLSL/GPU-acceleration if all modules support it. Not sure if Unity has something similar.