/ Choose Spline - 3D Design tool in the browser with real-time collaboration if
Its stated focus matches what you need: Spline is a free 3D design software with real-time collaboration to create web interactive experiences in the browser. Easy 3d modeling, animation, textures, and more.
/ Choose UXPin | UI Design and Prototyping Tool if
Its stated focus is closer to your workflow: Design tool like no other. Prototypes that feel real, with powers of code components, logic, states, and design systems. Join for free!