JetBrains Web UI Components
"The Ring UI library gives you the power of complex UI controls that have been developed at JetBrains over the years. It contains over 50 React controls, ranging from simple links and buttons to sophisticated controls, such as Date Picker or Data List.
The collection of UI components aims to provide all the necessary building blocks for web-based products built inside JetBrains, as well as third-party plugins developed for JetBrains' products.
This library is extensively used inside YouTrack, Hub, Upsource, and other products, and we are committed to developing and maintaining it for many years to come."