A large source of high-quality Sketch downloads. Sketch App Sources features plugins, tutorials, tips, articles, UI kits, wireframe kits, templates, icons, and many design resources created by Sketch users around the world, including complete sections for iOS.Sketch is fast becoming the app to use for iOS interface design and one of the best ways to learn new techniques and design principles is to study and analyse the work of others, which is why Sketch App Sources is a great site.