Front-end

Theme UI is a library for creating themeable user interfaces based on constraint-based design principles. Build custom component libraries, design systems, web applications, Gatsby themes, and more with a flexible API for best-in-class developer ergonomics.

Storybook is an open source tool for building UI components and pages in isolation. It streamlines UI development, testing, and documentation.

World's first Design-System-as-a-Service platform. Build, maintain and deliver your design system to all your product teams, blazing fast

Specify helps you unify your brand identity by collecting, storing and distributing design tokens and assets for your design system — automatically.

Formspree is a form backend, API, and email service for HTML & JavaScript forms. It’s the simplest way to embed custom contact us forms, order forms, or email capture forms on your static website.

Drag and drop form building

Collect submissions, receive emails and connect your HTML form with popular apps. Perfect for JAMStack and API-driven static websites. No form backend

The Workday Canvas Design System provides designers and developers with tools to create exceptional experiences.

Assets for building high-quality, consistent user experiences at Thumbtack.

The design system that powers GitHub. We love it so much, we chose to open-source it to allow the community to design and build their own projects with Primer.

The cohesive design language, shared vocabulary, and building block components to accelerate the building of Pluralsight products.

The definitive guide to standardize the design/code of the UI Components based on the 39 most popular Reference Systems.

Prism is a lightweight, extensible syntax highlighter, built with modern web standards in mind. It’s used in millions of websites, including some of those you visit daily.

Swiper is the most modern free mobile touch slider with hardware accelerated transitions and amazing native behavior.

Dynamic (JSON powered) form library for Angular that bring unmatched maintainability to your application's forms.

React hooks and components for hassle-free form validation. The world's leading companies use Formik to build forms and surveys in React and React Native.

An enterprise-class UI design language and React UI library with a set of high-quality React components, one of best React UI library for enterprises

Lottie is a library for Android, iOS, Web, and Windows that parses Adobe After Effects animations exported as json with Bodymovin and renders them natively on mobile and on the web

Développer vos sites et applications en utilisant des composants prêts à l'emploi, accessibles et ergonomiques

A visualizer to help you learn how the DOM Event system works through exploration

Our purpose is to allow web developers to style and extend built-in web UI controls, such as dropdowns, checkboxes, radio buttons, and date/color pickers.

Animate.css is a library of ready-to-use, cross-browser animations for use in your web projects. Great for emphasis, home pages, sliders, and attention-guiding hints.

Create fast loading, highly readable, and 100% responsive interfaces with as little css as possible.

Design tokens and design system generator. Use the design system you already have. Extract design tokens from websites and use them in code and in your design tool.

The React codebase generator. Divjoy handles all the integration details. From routing to React hooks, you'll have everything you need to build something great.

Through a series of simple, composable layouts, Every Layout will teach you how to better harness the built-in algorithms that power browsers and CSS.

Atlassian's end-to-end design language to create straightforward and beautiful experiences.

In-depth information and UI resources for designing apps that integrate seamlessly with Apple platforms.

Adele is on a mission to collect all the data about publicly available design systems and pattern libraries and present it to the community in human (website) and computer (JSON) readable formats.

Our design system helps us work together to build a great experience for all of Shopify’s merchants.