Penpot
Penpot is a collaborative, open-source design and prototyping tool tailored for designers and developers. It supports responsive UI layouts using native web standards such as CSS Grid, Flexbox, and SVG. The platform enables teams to build scalable design systems with shared libraries, components, and design tokens. Penpot also offers code inspection features and integration capabilities for AI workflows, bridging the gap between design and production code.
Checked on Sep 30, 2026.
Alternative resources
Ant Design
An enterprise-class UI design system and component library for building modern web applications with React.
Excalidraw
Virtual whiteboard tool that lets you sketch hand-drawn style diagrams stored locally in the browser.
Material Design 3
Google's open-source design system for building adaptive, expressive, and usable digital products across platforms.