3 projects are written in CSS, listed alphabetically. They are Basecoat, Material Web and Tabler. All of them UI components and editors, most of them open source. 38 records do not record this field, and cannot appear here either way. Counts only projects with momentum; the full list has the rest.
B
BasecoatComponent library built with Tailwind CSS that works with any web stack.
M
- Material Web
Web components for the Material 3 design system, installed from the @material/web npm package.
T
TablerFree and open source HTML dashboard UI kit built on Bootstrap 5, with layouts and components for admin panels and web apps.
What is the best web software written in CSS?
We can't tell from here. What suits an editor-heavy marketing site can be wrong for a static documentation site. The list is alphabetical and nobody paid for a place on it.