As mentioned in the Read Me already, Kilvin is especially build for applications build with Fela as it requires a working Fela setup.
The components are extracted from several projects build by Fela's Author. Therefore they might be quite opinionated. Still they include a lot of experience and combine multiple components for different projects into a small set of universal components.
All components have initially been copied from react-layout-components. Thus if you're not using Fela and still want to use Kilvin, react-layout-components might provide pretty similar components.