Open source. Open possibilities.

OpenUI is a full-stack, renderer-agnostic Generative UI framework built around OpenUI Lang, a compact streaming-first language that lets AI models generate structured UI with up to 67% fewer tokens than JSON.

Morphic is an AI-powered search engine with a generative UI that renders rich inline components from streamed JSON specs, supporting multiple AI and search providers, chat history, auth, and Docker deployment.

Better Design is an open-source MCP server and shadcn/ui registry that supplies AI coding agents with design systems, semantic CSS tokens, component overrides, UI principles, icon matching, and WCAG-oriented review rules. It includes 31 themes and connects to Claude Code, Cursor, VS Code/GitHub Copilot, Claude Desktop, and other MCP clients.

CopilotKit is an SDK for building agent-native apps with Generative UI, shared state, and human-in-the-loop workflows on React, Angular, Vue, React Native, Slack, and Microsoft Teams. MIT-licensed; the team behind the AG-UI Protocol.

AgnosticUI Local (v2) is a CLI-based, framework-agnostic UI component library that copies component source, styles and tests directly into your project for React, Vue, Svelte or Lit, with 55 accessible components, CSS custom-property theming and AI prompt playbooks.

A collection of 120 plain-text DESIGN.md brand design specifications reverse engineered from live production sites, letting AI coding agents generate on-brand UI. Each brand includes real colors, typography, components and guardrails plus a self-contained preview.html.