Sketch2AE Script allows UX Designers to import Google Sketch artboards straight into After Effects as editable shape and text layers, without the tedious task of redrawing everything in Illustrator first. Inspector Spacetime allows you to bring motion specs from Sketch to After Effects. Both are from Google SUMux Motion Design.
Just so we’re clear, this is not SketchUp, but Sketch for creating UI design for apps. I have not used this software and from what I’ve read, it produces a lot of layers, however, it looks like it would be very useful for people designing apps.