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.

<package 
    id="pencil" 
    name="Pencil" 
    revision="%VERSION%" 
    priority="1"
    reboot="false">
    <variable name="VERSION" value="2.0.5" />
    <variable architecture="x86" name="progfiles" value="%PROGRAMFILES%" />
    <variable architecture="x64" name="progfiles" value="%PROGRAMFILES(X86)%" />
    <check type="uninstall" condition="exists" path="Pencil" />
    <install cmd='%SOFTWARE%\pencil\Pencil-%VERSION%.win32.installer.exe /S '/>
    <upgrade include='install' /> 
    <remove cmd='"%PROGFILES%\Evolus\Pencil\Uninstall.exe" /S '/>
</package>