Take a closer look at how Atomic's features can supercharge everyday design tasks, as well as help you achieve high-fidelity large-scale prototypes.

Send artboards straight from Sketch into your Marvel projects.

Principle makes it easy to design animated and interactive user interfaces. Whether you're designing the flow of a multi-screen app, or new interactions and animations, Principle lets you create designs that look and feel amazing.

Change the way you design with the most powerful prototyping platform on the planet.

Pencil is built for the purpose of providing a free and open-source GUI prototyping tool that people can easily install and use to create mockups in popular desktop platforms.

Take screenshots, snap webpages, draw on images, and much more. Ember makes it incredibly easy to capture and organize the images that inspire you. (recommended by Hans Põldoja)

Framer.js is an open source JavaScript framework for rapid prototyping. Framer.js allows you to define animations and interactions, complete with filters, spring physics, 3D effects and more. It's bundled with Framer Generator, an application that allows you to import layers directly out of Photoshop and Sketch.

You need the potential to design something completely new. Prototyping shouldn’t limit you. Framer is a prototyping tool that uses code to make anything possible. Pioneer new patterns and make groundbreaking design. Find the best solution, not just the expected one.

Create prototypes that feel completely real, right from your desktop. Connect your iOS and Android device to preview your prototypes in full native fidelity. And the best part: Studio is completely free.

Working with color while designing is really about creating another dimension in your medium. Choosing a successful palette creates a foundation for adding meaning and hierarchy to your design. Although it may seem overwhelming at first, choosing a palette can be a very straightforward process

a magical utility belt for stylus

A dead simple, responsive boilerplate.

Ultra–Lean HTML5, CSS, & JS Building Blocks for Rapid Website Production

UXPin is the UX Design Platform that gets it right.

NinjaMock delivers all of the typical controls used in mobile apps and web designs. iOS, Android, Windows Phone, Surface: we have all you need to start prototyping apps for your mobile device projects.

A complete grid system for super fast wireframing and visual design.

Paper prototyping is a commonly used low cost usability method for testing and evaluating web designs and applications. This method lets developers conduct tests before a single line of code has been written, and allows you to identify and fix any potential issues early on in development.In this post we have collected our top 10 videos that not only illustrate how effective paper prototyping can be, they also show you how to cost effectively conduct your own tests and some of the videos have been animated, which are just amazing to view.

Smart Objects are magical containers. They can hold an image, a vector graphic, or a complex set of layers. You can duplicate a Smart Object many times within your file and update the Object once to change all instances. You can apply filters to a Smart Object non-destructively, so you can remove them at any time. You can also transform Smart Objects (scale, rotate, skew, distort, etc etc.) without losing the original image data or quality.

Hundreds of tools may be available for interaction designers, but there is still no industry standard for interaction design the way Photoshop and Illustrator are to graphic design. Popular programs are out there, but many of them have considerable drawbacks, which has led me to explore alternative apps.