Prime is a UI framework for Sketch that may come in handy when you need to create a full-fledged Design System at the speed of light.
Freebies tagged frameworks
Tailwind CSS is a utility-first CSS framework for rapid UI development, a CSS where class names are not based on their content but describe what they do.
Tailwind CSS: A framework for rapid UI development
Shards is a free design system based on Bootstrap 4 framework which includes responsive components and icons from both Material and Font Awesome.
Shards: A modern UI toolkit based on Bootstrap 4
Shoelace is a basic CSS starter kit that you can customise. through CSS variables and it doesn’t require Less, Sass or any preprocessor.
Shoelace: A lightweight CSS starter kit
fractures is a CSS toolkit providing a set of CSS utility classes that may be used for quick prototyping as well as for production.
fractures: An atomic CSS toolkit for building websites
iotaCSS is a new SASS based framework built by Dimitris Psaropoulos for creating lightweight, performant, readable and fully responsive interfaces.
iotaCSS: A Sass design agnostic framework
Carbon Design System is a free set of UI kit released by IBM and available for designers and developers, as Sketch file and HTML + SCSS component library.
Carbon: A design system from IBM
Tent CSS is a new framework built with Sass and BEM (zero JavaScript dependencies!) that includes only the essentials to get started with website design.
Tent CSS: An essential framework
Propeller is a responsive CSS framework that combines Google Material Design and Bootstrap components into a new library.
Propeller: CSS framework based on Google Material and Bootstrap
Element is a complete and minimal framework based on Vue.js that includes many useful UI components to quickly build websites and apps.
Element: A desktop component UI library
Wing is a fresh new CSS framework for fast and intuitive development of small responsive websites that comes with basic elements styles.