Gravit

Managing the assets of design systems in Sketch is complex, error-prone and time consuming. Sketch is scriptable, but the API often changes. React provides the perfect wrapper to build reusable documents in a way already familiar to JavaScript developers.

UX guidelines, HTML/CSS framework, and Angular components working together to craft exceptional experiences. Start building with our HTML/CSS framework and rapidly go from prototype to production.

Sizzy is a tool for developing responsive websites crazy-fast. It allows you to preview a URL on multiple devices at once, filter the devices, zoom them in and out, and more.

Create dynamic, cross-platforms UIs using design tools, code, or both.

It 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.

It is a free & open-source developer toolkit for expressing visual styles that can be shared across codebases, native platforms, and teams. It radically lowers the cost of delivering a consistent visual identity across native apps & websites.

It provides the same flexibility as your favorite image editor but also writes semantic HTML and remarkably succinct CSS. It's time to expect more from a web design tool.

A browser extension for coders to measure screen dimensions. Currently only available for Chrome. Download from the Product Website or the Chrome Webstore.

It is an open-source, browser-based 3D graphics suite. You can edit scenes and materials, design effects and shaders, code behaviours, and share your work - all within a browser using standard web technologies.

Interactive field-aligned mesh generator.

It is a toolkit that simplifies the creation of rich and interactive 2D or 3D experiences for any device from mobile to desktop to AR/VR. It gives you general-purpose HTML Elements for defining 2D or 3D scenes rendered with CSS3D, WebGL, or both mixed together.

It is a free and open source design presentation and collaboration platform. It has an Intuitive drag&draw interface.

It is an open-source design system for your next travel project. It is a React component library that provides developers with the easiest possible way of building Kiwi.com’s products.

It is a project dedicated to creating simple but effective tools to help with the day-to-day tasks of designers and developers. one of the main goals of this project is to allow junior developers to give back to the community by building small-scale applications with open source in mind.

It is an open-source UI design tool to create and maintain Web Components. Create components visually and use them with any framework, or with vanilla HTML/JavaScript.

It provides the open-source building blocks to design and implement consistent, accessible, and delightful product experiences.

It is an open-source platform to manage design templates directly in code, making it easy to create the building blocks of your app. It will run a visual editor of your theme and then directly export your design tokens to.js, .ts, .css, .scss, .json.