Preline UI is an open-source set of prebuilt UI components based on the utility-first Tailwind CSS framework.

🎨 Vibe Design System - Official monday.com UI resources for application development in React.js

AgnosticUI Local (v2) is a CLI-based UI component library that copies components directly into your project. Works with AI tools, agent-driven UIs, and prompt-ready workflows.

AI-powered annotations for localhost development. Create visual feedback on your apps and let AI coding agents automatically implement fixes via MCP integration.