* [Vanilla Framework v4.58.0](https://github.com/canonical/vanilla-framework) – Extensible CSS framework built with Sass for consistent theming and styling.

* [CSS Zero v4.2.0](https://github.com/lazaronixon/css-zero) – Opinionated CSS starter kit for Ruby on Rails applications.

* [NHS.UK frontend v10.6.0](https://github.com/nhsuk/nhsuk-frontend) – Codebase for building user interfaces for NHS websites and services.

* [Marx v5.3.2](https://github.com/mblode/marx) – Classless CSS framework that styles semantic HTML with zero specificity and a compact --marx-\* theming API, including automatic light/dark mode.