GUI Design Studio allows developers, analysts, designers, interaction specialists and business professionals to quickly create interactive prototypes without writing a single line of code.
United States
Pencil Project Alternatives
Pencil Project is described as 'Pencil is a standalone app that lets you create diagrams or UI mockups. It doesn't have collaboration/multi-user features' and is a very popular UI Design tool in the photos & graphics category. There are more than 50 alternatives to Pencil Project for a variety of platforms, including Windows, Mac, Web-based, Linux and iPhone apps. The best Pencil Project alternative is Penpot, which is both free and Open Source. Other great apps like Pencil Project are Figma, LibreOffice - Draw, Open Pencil and Penpot Desktop.
Alternatives list
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Online tool for creating mockups in the browser. Use your browser’s save function to save the file (just html for view only, complete save for an editable version) or export to codepen for others to view.
Cost / License
- Free
- Open Source
Application types
Platforms
- Mac
- Windows
- Linux
- Online
- Self-Hosted
AI-powered prototyping tool enabling product teams to quickly generate UI aligned to existing styles, import design systems, collaborate live, gather user feedback, test new features, support data-driven decisions, and ensure enterprise-level security and compliance.
Cost / License
- Freemium
- Proprietary
Application types
Platforms
- Online
- Software as a Service (SaaS)
Serena Prototype Composer - the best agile application prototyping tool is now free! View the demo, take the product tour, or download it free today.
Cost / License
- Freemium
- Proprietary
Application types
Alerts
- Discontinued
Platforms
- Windows
P
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.
Cost / License
- Paid
- Proprietary
Application types
Platforms
- Windows
- Microsoft Office Powerpoint
FlairBuilder is a user interface prototyping tool for easy authoring of interactive website wireframes, mockups and GUI prototypes.
Helix is a free AI-powered prototyping tool that turns ideas into interactive prototypes in just 3 minutes—no coding or design skills needed.
+3
EaSynth ForeUI is an easy-to-use UI prototyping tool. You can use ForeUI to create skinnable prototype of software or website, and run the interactive simulation in your web browser. You can switch the UI theme of the prototype, thus the fidelity will be changed as well.
Kwippe has a curated database of over 33,000 open source and creative commons vector icons, emojis, and other graphics that can be customized in our easy to use editor and variations generator.
+1
Diagramo is an online flowchart software
- diagrams (create, edit and share)
- organization charts (create, edit and share)
- network diagrams (create, edit and share)
- graphs (create, edit and share).
Cost / License
- Free
- Open Source
Platforms
- Online
Germany
EU
