Pencil is a standalone app that lets you create diagrams or UI mockups. It doesn't have collaboration/multi-user features.
Cost / License
- Free
- Open Source (GPL-2.0)
Application types
Alerts
- Discontinued
Platforms
- Mac
- Windows
- Linux
- PortableApps.com




There are many alternatives to OmniGraffle for Mac if you are looking for a replacement. The best Mac Prototyping Tool alternative is Pencil Project, which is both free and Open Source. If that doesn't suit you, our users have ranked more than 100 alternatives to OmniGraffle and five of them are Prototyping Tools available for Mac so hopefully you can find a suitable replacement. Other interesting Mac Prototyping Tool alternatives to OmniGraffle are Frame0, Balsamiq Wireframes, Axure RP and SwordSoft Layout.
Pencil is a standalone app that lets you create diagrams or UI mockups. It doesn't have collaboration/multi-user features.




Sketch your app ideas without stress Make hand-drawn style wireframes quickly and easily.




Low-fidelity UI wireframing tool simulating sketching experience, optimized for speed with Quick Add, built for collaboration, drag-n-drop simplicity, exportable wireframes to PNG/PDF, interactive prototypes via linking, hundreds of UI components, reusable symbols, and more.




Axure RP is the leading tool for rapidly creating wireframes, prototypes and specifications for applications and web sites.






SwordSoft Layout is an desktop application that makes it very easy for you to create, preview, and manage mockups of your website, mobile application or desktop application. With so many UI elements to choose from, you can design anything.
Can create flow charts in seconds.