Penpot is an open-source design and prototyping tool for Product teams, where designers and developers can truly collaborate faster together. It allows you to work on your mockups, wireframes and web / app / UX & UI designs. Penpot avoids the structural hand-off bottleneck between design and code by speaking the coding language. Making designer-developer collaboration seamless. It is multiplatform. It can either be used via web browser or self-hosted in case you need further control. You can turn your designs into SVG files that are compatible with most vectorial tools, avoiding vendor lock-in issues.