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




Balsamiq Wireframes is described as 'Low-fidelity wireframing tool emulating sketching, built for online teamwork, offering drag-n-drop simplicity, reusable components, interactive prototypes, and exportable wireframes' and is a very popular Wireframing tool in the development category. There are more than 50 alternatives to Balsamiq Wireframes for a variety of platforms, including Mac, Web-based, Windows, Linux and SaaS apps. The best Balsamiq Wireframes alternative is Pencil Project, which is both free and Open Source. Other great apps like Balsamiq Wireframes are Penpot, Figma, Penpot Desktop and Napkins.dev.
Pencil is a standalone app that lets you create diagrams or UI mockups. It doesn't have collaboration/multi-user features.




Open-source design platform offering web-based and self-hosted workflows, code inspection in HTML and CSS, adaptive layouts with CSS Grid and Flex, real-time collaboration, auto layout features, reusable components, design tokens, layer support, plugins, and no tracking.




Figma is a web-based platform offering a robust set of tools for vector graphics editing and prototyping, along with offline desktop apps for seamless workflows. Designed specifically for UI and UX design, it emphasizes real-time collaboration, visual versioning, and vector networks to streamline the designer's work.




Penpot Desktop is an unofficial desktop application for the open-source design tool, Penpot.



An open source wireframe to app tool powered by Llama 3.2 vision. Upload a screenshot of a simple site/design & get code.


Combines code-driven and visual editing workflows for interactive UI design, high-fidelity prototyping, real-time team collaboration, reusable components, inline commenting, mobile previews on Android/iOS, and smooth developer handoff for efficient workflow.








Whimsical is a collaborative visual workspace for creating flowcharts, wireframes, virtual sticky notes, and more!.




OmniGraffle can help you make eye-popping graphic documents—quickly—by providing powerful styling tools, keeping lines connected to shapes even when they’re moved, and magically organizing diagrams with just one click.




A streamlined web app that helps you create and collaborate in real-time on wireframes, mockups, diagrams and prototypes.




Feature-rich, open-source Wireflow offers a collaborative platform for online creation of complex user flow prototypes. Ideal for team work in UI design, wireframing, and mind mapping, promoting idea sharing in real-time environment aided by modern whiteboard features.

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




It's ok as an alternative, but it fails in creating interactive wireframes