Depending on your stack, there are quite a few options.

Laravel:

- https://filamentphp.com/

- https://bladewindui.com/

Rails:

- https://zestui.com/ (Disclaimer: my project)

Alpine+Tailwind:

- https://devdojo.com/pines

- https://sailboatui.com/ (minimal alpine)

WebComponents:

- https://shoelace.style/

Others:

- https://daisyui.com/

- https://flowbite.com/

- https://preline.co/index.html