Sketching & GUI Prototyping, FREE & OPEN!

With the power of the underlying Mozilla Gecko engine, Pencil turns your excellent Firefox 4+ browser into a sketching tool with just a 900-kilobyte installation package.

Pencil will always be free and can run on virtually all platforms that Firefox 4+ supports.

The Pencil Project's unique mission is to build a free and opensource tool for making diagrams and GUI prototyping that everyone can use.

Top features:

  • Built-in stencils for diagraming and prototyping
  • Multi-page document with background page
  • Inter-page linkings!
  • On-screen text editing with rich-text supports
  • Exporting to HTML, PNG, Openoffice.org document, Word document and PDF.
  • Undo/redo supports
  • Installing user-defined stencils and templates
  • Standard drawing operations: aligning, z-ordering, scaling, rotating...
  • Cross-platforms
  • Adding external objects
  • Personal Collection
  • Clipart Browser
  • Object snapping
  • Sketchy Stencil
  • And much more...

Licensing and Versions:

Pencil will always be free as it is released under the GPL version 2 and is available for virtually all platforms that Firefox 4+ can run. The first version of Pencil is tested against GNU/Linux 2.6 (Fedora, Ubuntu and Arch) with GTK+, Windows XP and Windows Vista/7.