This guide is designed as a "get started" or introductory read for the starting to intermediate designer who wants to learn or get more knowledge about cross-DPI and cross-platform design from the very beginning.

Find Facebook logos, images, product names and screenshots, and other assets and learn how to use them.

… a set of digital documents that enable you to bypass the trial and error of developing a process of working with clients.

A handy little Mac app that gives you quick access to the standard material design color palette.

web and mobile app prototyping

App Prototyping Tools For Designers

[…] a suite of plugins to let you design with real data in mind. Manage them via the new Craft Manager for incredibly easy updating.

Principle makes it easy to create animated and interactive user interface designs. Whether you're designing the flow of a multi-screen app, or new interactions and animations […]

A handy article on Vertical Rhythm and Modular Scale with Viewport Units.