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This pen explores the benefits of using modular scale ranges to create fluid typography between a defined minimum and maximum screen size.

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Create, share, and apply color palettes to your UI, as well as measure the accessibility level of any color combination.

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Ad mockups provides a free tool to create mockups of ads on the fly.

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Keyframes gives you a visual timeline to help you create, view, and run animations without having to go back and forth between your browser and editor. And it gives you the CSS when you're done.