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The 1st Collaborative AI Design Agent Workspace. Local-first and open source. Create motion, prototypes, websites, apps, dashboards, presentations, images, and videos with your team and AI agents. Share work, exchange feedback, and iterate together in one workspace.
Penpot: The open-source design platform for Product teams that need scalable collaboration.
An open source prototype sandbox for designers and product managers who build.
AI-native infinite-canvas design tool: describe an app, get multi-screen HTML designs on an infinite canvas, click through them as a prototype, and let your local coding agent read and write the canvas over MCP.
The Pencil Project's unique mission is to build a free and opensource tool for making diagrams and GUI prototyping that everyone can use.
Mockoon is the easiest and quickest way to run mock APIs locally. No remote deployment, no account required, open source.
Rapidly create HTML prototypes of GOV.UK services
Flexible layout tool for creating UI on any platform