Untitled UI is the world's largest Figma UI kit and React component library. Kickstart any project with everything you need to design and develop—fast.
Cost / License
- Freemium
- Open Source (MIT)
Platforms
- Figma
- React




Semantic UI is described as 'UI framework offering over 50 UI elements and 3000+ CSS variables. Integrates with React, Angular, and more, providing responsive design and easy theming' and is a CSS Framework in the development category. There are more than 100 alternatives to Semantic UI for a variety of platforms, including Web-based, Self-Hosted, Mac, Windows and Linux apps. The best Semantic UI alternative is Bootstrap, which is both free and Open Source. Other great apps like Semantic UI are Tailwind CSS, Bulma, Material UI and Foundation.
Untitled UI is the world's largest Figma UI kit and React component library. Kickstart any project with everything you need to design and develop—fast.




Simple. Robust. Responsive. Flexible.
Based on Flexbox (CSS Flexible Box Layout Module), Gridlex is a very simple css grid system to quickly create modern layouts and submodules.

Build your website interface using a responsive CSS framework with various components and with integrated dynamic functionalities.
Free for non-commercial purposes.



Webments is a collection of libre frameworks designed with scratch CSS using different design languages.




AlloyUI is a framework built on top of YUI3 (JavaScript) that uses Bootstrap (HTML/CSS) to provide a simple API for building high scalable applications.
The 960 Grid System is an effort to streamline web development workflow by providing commonly used dimensions, based on a width of 960 pixels. There are two variants: 12 and 16 columns, which can be used separately or in tandem.
Frow is an HTML and CSS framework for creating quick, responsive, mobile-first projects on the web.
Carbon is IBM’s open source design system for products and digital experiences. With the IBM Design Language as its foundation, the system consists of working code, design tools and resources, human interface guidelines, and a vibrant community of contributors.


