User Interface stencils
Free
Whale UX Wireframing Kit
Using custom XML shapes (included), this wireframing kit allows you to create complex forms and UI elements that act as a single shape. Includes pixel-optimized original icons and ideograms, buttons with glass effects and realistic Mac and Windows pointers.
Free
Wide Grids (Magnolia CMS)
Wide Grids stencil from the Magnolia CMS Standard Templating Kit (STK) Stencil kit.
$19.00
Windows 7 Stencil
Windows 7 user interface components from the Windows Stencil Kit.
Free
Windows 8: App bars
App bars for Windows 8.
Free
Windows 8 Basic
Windows 8 basic stencil set based on the Microsoft Photoshop templates. See also: Windows 8 Templates (Light) and Windows 8 Templates (Dark)
Free
Windows 8: Category views
Category views for Windows 8.
Free
Windows 8: Detail page
Detail page for Windows 8.
Free
Windows 8: Device hub page
Device hub page for Windows 8.
Free
Windows 8: Dialogs
Dialogs for Windows 8.