Penpot

Penpot is an open-source design and prototyping platform for teams. It offers collaborative UI/UX design, interactive prototyping, responsive layouts, and SVG-native editing—entirely free and self-hostable.

Key Features:

• Collaborative UI/UX design

• Interactive prototyping

• SVG-native editing & flexible layout tools

• Self-hosting & open-source customization

• Works for product teams, agencies, and developers