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




Keynotopia is described as 'Prototype cheaply and quickly for iPad, iPhone, Android, Windows Phone 7, Facebook and web using Apple Keynote, Microsoft PowerPoint or OpenOffice Impress' and is a Wireframing tool in the development category. There are more than 25 alternatives to Keynotopia, not only websites but also apps for a variety of platforms, including Windows, Mac, Linux and iPhone apps. The best Keynotopia alternative is Pencil Project, which is both free and Open Source. Other great sites and apps similar to Keynotopia are Balsamiq Wireframes, Wireflow, Wondershare EdrawMax and Apache OpenOffice Draw.
Pencil is a standalone app that lets you create diagrams or UI mockups. It doesn't have collaboration/multi-user features.




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.




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.

Versatile diagram software offering extensive templates for flowcharts, org charts, and more. AI integration simplifies diagramming, facilitates project analysis, and includes features like chatbots and OCR. Suitable for personal, professional, and collaborative use.




Draw, part of the Apache OpenOffice suite, is a graphics editor that gives you the tools to communicate with visuals and diagrams. With a maximum page size of 300cm by 300cm, Draw is powerful tool for posters, graphs, charts, and more.



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




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




Instead of starting with a blank screen, SmartDraw gives you the exact template you need. Then use simple commands to add your information and SmartDraw does the rest. There's no other drawing software like it.




A collaborative design tool offering wireframing, prototyping, and design specs creation in a single browser-based platform. Integrate seamlessly with your workflow via API, sync with Sketch and Photoshop, and utilize a vast library of assets. Streamline design-to-dev with automated code generation.





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.




ProcessMaker is a cost effective and easy to use open source business process management (BPM) or workflow software application.



