Ant Design - An enterprise-class UI design language and React implementation with a set of high-quality React components, one of best React UI library for enterprises
supastarter - The boilerplate for your next web app built on top of Supabase and Next.js.
Makerkit - Customer feedback, public roadmap & product changelog
Material UI - A CSS Framework and a Set of React Components that Implement Google's Material Design
Widin.io - The SaaS starter for hexagonal architecture
DevExtreme - HTML5 Widgets & SPA Framework for Desktop and Mobile