Penpot

It is an open-source, browser-based design platform for creating responsive interfaces, interactive prototypes and design systems that bridges designer-developer handoff and maintains consistency at scale. It sells to designers, developers and product teams in businesses of all sizes that need scalable collaboration on digital products. Positioned as an open-source and open-standards alternative to proprietary tools such as Figma, Adobe XD and Sketch, it is delivered as SaaS with a self-host option.

Key features

• Responsive UI design with wireframes
• Interactive prototyping with flows
• CSS Grid and Flex layouts
• Components, variants and design tokens
• Shared libraries and design systems
• Real-time multiplayer collaboration
• Comments and shareable presentations
• Code inspect with CSS HTML SVG JSON
• Open file format
• AI workflows with any agent and LLM
• MCP Server integration
• Fonts management