DRUIDS (Datadog Reusable User Interface Design System) is the design system powering Datadog's monitoring platform, publicly documented at druids.datadoghq.com even though the underlying code isn't open source.
It's strongest for observability and data-heavy dashboard patterns specifically (graphing, layout, dataviz), and the React/TypeScript/CSS code is treated as the actual source of truth, with JSDoc comments linking straight from VS Code back to the docs, a workflow worth studying even without access to the code itself.
Designers and developers building monitoring, analytics, or other data-dense dashboards who want to study proven dataviz and graphing patterns from a company built entirely around them.
The docs are public but the code isn't open source, so this is a reference to study rather than a library to install directly.
Druids is Datadog's design system — the UI foundations and components behind its product.
