Once UI is an open-source design system for Next.js, tailored specifically for indie creators, offering a seamless way to build and ship fully functional applications.

It allows developers to write 70% less code using a human-readable, machine-writable syntax. The system includes over 100 pre-styled, open-source components, enabling the creation of semantic layouts with Row, Column, and Grid.

Key features include complex theming managed with a few keywords in a single file, app-level state management for themes, toasts, icons, and layouts, and interactive elements for forms and data entry.

Once UI is designed to help solo founders and small teams scale faster without the chaos of traditional design systems. It is community-driven, with a public roadmap available in the documentation, and is licensed under MIT.

Discover how Once UI can transform your development process and help you launch quicker with its deployment-ready apps!