Wireframe Software online

Pencil Project is a desktop-based tool for GUI prototyping and creating diagrams. It can operate as an add on to Firefox, or on its own.It is  free and open source, and functions on Windows, GNU and Linux operating systems, but not on Mac.


  • Stencils – preprogrammed stencils for prototyping and diagramming.
  • Links – links now operate between pages.
  • Export – You can export in PNG, PDF, Word document, Openoffice.org and HTML.
  • Editing – Rich text editing of your prototype is available.


Pencil is free to download, as a firefox add on, or as a stand alone application. You can download it at http://pencil.evolus.vn/en-US/Home.aspx .


Pencil Project has no collaborative features, and so would not suit business or design teams. However it is a free and easy-to-learn prototyping tool.

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Pencil Project: Sketching and Prototyping with Firefox, 3.0 out of 10 based on 1 rating

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