Using Sketch For Responsive Web Design
A delightful article that takes any current Photoshop and Illustrator users how to start off using Sketch as part of your designing responsive workflow.
Firing up Sketch, you’ll immediately notice a clean, unbloated interface. Yes, Sketch’s toolset is certainly pared down compared to some other design programs. However, it includes only what can be recreated with HTML and CSS3.
An excerpt from Using Sketch For Responsive Web Design