Back when I did Mac OS 9 development, we used Metrowerks' PowerPlant framework. Constructor, their GUI editor, made laying out user interfaces a joy. It just worked.

When I came back to try iOS development, and saw the sad state of IB, I wondered how things had fallen so far.

Then I tried Android development. Hand rolled XML layout of UI? NOPE.

I too am surprised that no one has developed tools to just do this.