Pencil Project
Free
Open-source GUI prototyping tool for creating mockups and diagrams.
Key Information
Platforms
WindowsLinuxmacOS
Use Cases
WireframingGUI PrototypingMockupsDiagrammingApp Design
Additional Features
Features
Wireframing
Shapes Library
Export to PDF/PNG
Stencils
Templates
Cross-platform
Pricing Information
Free Tier Available