Fluid for Sketch Overview
A Sketch plugin that provides a means to create responsive designs based on Auto Layout constraints. Fluid for Sketch, like Auto Layout constraints, allows you to pin, offset, centre, and size relative to parent group, parent artboard, or previous sibling layer. You can then view your artboards at different sizes (Mobile, Tablet, Desktop) using Preview Mode. Fluid might not completely match Auto Layout, but it'll certainly help you think about and design for adaptive layout when using Sketch.