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 Flairbuilder for Windows if you are looking for a replacement. The best Windows alternative is Pencil Project, which is both free and Open Source. If that doesn't suit you, our users have ranked more than 25 alternatives to Flairbuilder and 16 are available for Windows so hopefully you can find a suitable replacement. Other interesting Windows alternatives to Flairbuilder are Frame0, Balsamiq Wireframes, Axure RP and WireframeSketcher.
Pencil is a standalone app that lets you create diagrams or UI mockups. It doesn't have collaboration/multi-user features.




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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.




WireframeSketcher is a software tool that helps product managers, designers and developers quickly create wireframes, mockups and prototypes for desktop, web and mobile applications. It’s standalone software and a plug-in for any Eclipse IDE.




Justinmind is the best solution to prototype any web or mobile app you can think of. You can define websites and apps for Web, iOS, and Android with our intuitive drag-and-drop interface. No code involved.




UXPin is a web-based system for managing design documents like wireframes, sitemaps, persona descriptions or flowcharts. It lets you upload image files, invite teammates to review and comment on them, and keep track of revisions.



HotGloo is a UX, wireframe and prototyping tool designed to build wireframes for web, mobile and wearables. Create and share fully interactive prototypes with your team and clients and gather feedback on the process.



Napkee makes your Balsamiq Mockups come alive. Import a BMML and export to web or flex code in a few clicks.

MockupTiger is a web based application that helps you to build fluid wireframes, mockups or prototypes for your next web application or desktop software.

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PowerMockup is a PowerPoint add-in for sketching screens of web and desktop applications. The interface elements make it a breeze to prototype and evaluate different design ideas before proceeding to the implementation.
