User Interface stencils

Free
Lines

Lines

Just a variety of line styles and colors, ready-made. Customize this with your favorite line-styles.

Free
Mac OS X Interface

Mac OS X Interface

Much interface design at Omni has started with a quick mockup in OmniGraffle. Here's the stencil I've been building, adding elements as I need them. Most designs start with an existing screenshot, with swatches of controlColor over things we need to get rid of, and layers of new controls on top of that. Clearly there are lots...more

Free
Web Flowchart

Web Flowchart

Charles Parcell has created a very slick set of stencils for website flowcharting that has just about every component you might use for a site, from Flash to PHP to .Net. And all of them in a unique, colored style. Awesome.

Free
Windows GUI Design

Windows GUI Design

User interface elements for the Windows operating system, in case you have to design an interface where Aqua widgets are considered a strange and mysterious concept, and licking them is totally out of the question.