Popular stencils
Colorfill boxes
A set of colored boxes.
Facebook Applications
A pretty sizable collection of Facebook related elements to use in creating wireframes for Facebook applications.
Network and Peripherals (isometric)
Scaleable, labeled vector stencils converted from original isometric shapes of Visio 2007.
Page Thumbnails for UI Design
This stencil contains thumbnail representations of common types of pages, such as search, login, and error pages for quickly designing application and site navigation layouts. There's a point in design where it's efficient to lay out the big picture of the application or site you are designing without getting mired in the...more
Network 3D
The following picture shows an OmniGraffle palette I put together for doing network diagrams. It may be useful for others.
Functional Flow Block Diagram (FFBD)
Contains all the major components for a Functional Flow Block Diagram (FFBD), which are used in developing the functional architecture of a system and describing the system's functional flow.
iPhone 3G Stencil
Includes standard interface components for the iPhone 3G: buttons, fields, map elements, keyboards, icons... All components are on a transparent background and should re-size nicely. Thanks to teehan+lax and Mercury Intermedia for sharing their the Photoshop and Ilustrator files.
Isometric icons
A handy set of isometric icons based on Visio's icons.
Carousels
Carousels stencil from the Design Stencil kit in the Yahoo! Design Pattern Library.