Base UI is impressive Design System consist of 180 screens, supercharged with nested Nested Symbols and Predefined Text-Styles. It’s a great tool for playing around with flow and ideas, that activates design thinking like nothing else. With a Base UI Framework you access a huge arrangement of everything you need to design and prototype in Sketch.
Device Shots is a small web app that works as a tool to help you generate high-resolution device mockups with the screenshot of your website or mobile application, for free.
The 8px dot-grid helps with spacing accuracy while sketching. Life-size mockups so you don't kill time drawing devices, every time you Sketch UI. The UI Sketchpad helps you create good looking wireframes, faster!