Open-source design platform offering web-based and self-hosted workflows, code inspection in HTML and CSS, adaptive layouts with CSS Grid and Flex, real-time collaboration, auto layout features, reusable components, design tokens, layer support, plugins, and no tracking.













































































It's the best UX/UI tool out there, bar none. Besides very strong vector editor features, which allow creating responsive wireframes, mockups, and prototypes in no time, its collaboration features are unparalleled. It's extremely simple to hand off a design from UX to UI, or from UI to a copyrighter, allowing them to experiment on a duplicated page or just tweak the copy in the design.