a list by matteo manzinello, that really loves React
https://react-bootstrap.github.io
https://jetbrains.github.io/ring-ui
https://developer.microsoft.com/en-us/fabric#/components
https://elastic.github.io/eui/
https://primer.style/components
http://appnexus.github.io/lucid/
http://nikgraf.github.io/belle
https://www.primefaces.org/primereact
https://atlaskit.atlassian.com
https://www.carbondesignsystem.com/get-started/develop/react/
https://pinterest.github.io/gestalt
https://github.com/box/box-ui-elements
https://react-hk-components.herokuapp.com/
https://italia.github.io/design-react-kit/
https://lightningdesignsystem.com
https://www.patternfly.org/v4/documentation/react/overview/release-notes
https://react-spectrum.adobe.com/react-spectrum/getting-started.html
