User Interface stencils
Free
Windows 8: Hub page
Hub page for Windows 8.
Free
Windows 8: Forms
Forms for Windows 8.
Free
Windows 8: Dialogs
Dialogs for Windows 8.
Free
Windows 8: Device hub page
Device hub page for Windows 8.
Free
Windows 8: Detail page
Detail page for Windows 8.
Free
Windows 8: Category views
Category views for Windows 8.
Free
Windows 8: App bars
App bars for Windows 8.
Free
Sketchkit
The OmniGraffle stencils for the initially Keynote-only Sketchkit, a wireframing toolkit for iOS found here: http://www.sketchkit.com Sketchkit includes pre-drawn iOS interface elements that can be used to create wireframes for iPhone apps. Shared under Creative Commons Attribution ShareAlike 3.0 PDF version can be found...more
Free
Web Sketch Social Media Badges
Social Media badges in a "sketch" style, for mocking up web UX designs. Includes: Twitter, Facebook, StumbleUpon, Delicious, Digg, Reddit, Linkedin, MySpace, FriendFeed, RSS, Flickr, Technorati, YouTube, Bebo, and Pinterest.