Design & prototyping

Browser-based collaborative interface design platform with vector editing, components, prototyping, FigJam whiteboards, Dev Mode and a plugin and REST API

Collection of accessible React components built on Radix primitives and Tailwind CSS that are copied into a project's source rather than installed as a dependency

Free diagramming editor (formerly diagrams.net) for flowcharts, network, UML and architecture diagrams, available as web app, desktop app and integrations

Utility-first CSS framework from Tailwind Labs that styles markup with composable class names and generates only the CSS a project uses

Open-source virtual whiteboard for hand-drawn-style diagrams with live collaboration, embeddable as a React component, plus a hosted Excalidraw+ service

JavaScript library that renders flowcharts, sequence, class, state, ER, Gantt and other diagrams from a Markdown-like text syntax