Now UI Kit is a responsive Bootstrap 4 kit provided for free by Invision and Creative Tim. It is a beautiful cross-platform UI kit featuring over 50 elements and 3 templates.
Shards UI Kit is a free, modern and lightweight UI toolkit based on Bootstrap 4 that comes packed with 2 extra pre-built landing pages and 11 custom components that you can use to kick-off your next project.
Stream UI Kit is beautiful Open Source Bootstrap 4 UI Kit under MIT license. The UI Kit comes with 5 beautiful complete pages and includes over 20 reusable and customizable UI Blocks. It’s lightweight and only ~17kb when minified.
Nebular is an Angular 8 UI Library with a focus on beautiful design and ability to adapt it to your brand easily. It comes with 4 stunning visual themes, a powerful theming engine with runtime theme switching and support of custom css properties mode.
Dashboard UI Kit 2.0 is designed for Sketch and Figma but also as a fully featured HTML template with HTML, CSS and well-organized Sass files.
Introducing Modular, a free Android UI kit featuring tons of material design elements to kickstart your next native project in Framer. Copy and paste toggles, keyboards, sliders, then customize to perfection and watch as they automatically adapt to any screen size.