BootstrapCSS has amazing components.
TailwindCSS has amazing utility classes.
DaisyUI is a component library on top of Tailwind. It let's you use Boostrap-like components.
If you are using Tailwind, I think Daisy is a must-have layer on top.
Apart of components, it also provides semantic dark mode friendly colors and easy theming.
Install DaisyUI in a Rails app: [member-only link]
Episode source code: [member-only link]