I am looking for anything else has the same
WPF functionality (animation, 3D,...)
but can work in other platforms (Linux, Mac,...)
something powerful, fast to develop with, can create my own custom styling on the basic component
You want to look at JavaFX. It is a declarative syntax that looks like WPF. It supports transitions., animations, custom component.
They have builds that run on all the platforms you mention.
Please note, if you are not comfortable with C++ there is Qt/Python bindings called PySide.