uikit VS vanilla-framework

UIKit (WIP): https://github.com/kyoto-framework/uikit

UIKit (in active development): https://github.com/yuriizinets/kyoto-uikit

Started development of UI Kit. High-level components library that tries to bring fully featured components, like navbar, sidebar, statistics, headings, forms and so on. We are trying to avoid low-level components like buttons/inputs/selects as far as we think that low-level things can be made without components at all. Library now in active development and not recommended for using. We are trying to find out main problems while implementing components as a separate package.

Canonical's Vanilla Framework

Is this what you're referring to? https://vanillaframework.io/

I recently came across the Vanilla Framework, which is a CSS framework developed and maintained by the Canonical team, home of Ubuntu Linux distribution.

Vanilla framework is a lightweight and Sass-based extensible CSS framework. It is designed to be utilized directly or by using themes to enhance or support its patterns. Vanilla includes a responsive CSS grid, basic HTML element styling, and a set of helpful core patterns and extensible utility classes. You can include the entire framework to access all styles or utilize it as per your project requirement. Vanilla is open source, which means you can contribute to it, upgrade it, and extend it. The entire source code is available on GitHub.

vanilla-framework/vanilla-framework - From community websites to web applications, this CSS framework will help you achieve a consistent look and feel.