Different builds of Pencils are made for popular operating systems. Please select the build on the right side and start installing Pencil.

Pencil provides various built-in shapes collection for drawing different types of user interface ranging from desktop to mobile platforms. Starting from 2.0.2, Pencil is shipped with Android and iOS UI stencils pre-installed.

Stencils Different builds of Pencils are made for popular operating systems. Please select the builds on the right side and start installing Pencil.

Pencil is built for the purpose of providing a free and open-source GUI prototyping tool that people can easily install and use to create mockups in popular desktop platforms.

Developer Wiki In-depth guide for developers to create stencils and templates

Introduction to Pencil Stencil Overview Pencil controls shapes in its document by mean of stencils. Each stencil (Rectangle, for example) is indeed a template to generate shapes. Each template defines: The look: how the generated shape looks like by mean of SVG elements.

Developing Pencil stencil collections requires no special tools. What you need is just a text editor and for distribution, you need just a compatible archiving tool that can create ZIP files.

To help Stencil developers define how the content in shapes can be changed to be reflect shape's properties, Pencil provides the Behavior concept. With behaviors, attributes or content of the target object can be changed based on Behavior's input values.

Stencil Collection Structure and File Format Stencil Collection Structure A stencil collection is usually distributed as a single ZIP archive containing all related files for that collection. This collection ZIP archive has one main XML file named (exactly) Definition.xml and other optional files or sub-directories containing supporting files for the main XML (mainly for icon files). The ...

To guarantee the openness of Pencil, licensees are enforced to release modified versions of Pencil in the same terms as defined by the GPL2. This allows community users to benefit from all enhacements made by the others.