User Interface stencils
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
UX Activities and Documents
A stencil of UX activities and documents to illustrate the work that designers and researchers do. [originally created by Todd Zazelenchuk (Plantronics) and Elizabeth Boling (Indiana Univ)]
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.
Lines
Just a variety of line styles and colors, ready-made. Customize this with your favorite line-styles.