A macOS app for quick access to WCAG color contrast ratios → https://itunes.apple.com/de/app/contrast-color-accessibility/id1254981365?l=en&mt=12

App Prototyping Tools For Designers

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 […]

Simple color picker everyone

… is a nifty HTML5 App used to create wireframes, mockups or UI concepts, prototypes depending on how you like to call them.

News, resources, and tools for interface designers