Miscellaneous stencils
Post It Strips
Multi-colored Post It strips for brainstorming/organizing
Flow callouts
Rounded rectangular callouts with semi-transparent gradience.
Theater Lighting Symbols
An old Theatre Lighting stencil used for drafting is converted for OmniGraffle
Golden Ratio
A simple stencil with templates for ensuring your design/layout conforms to the Golden Ratio.
Degree Wheel
This symbol is a degree wheel or protractor. There are 360 ticks.
Twitter Bootstrap 1.4 Assets & Grid
This is based on the Bootstrap CSS Toolkit 1.4 from Twitter (http://twitter.github.com/bootstrap/). Provides a 940px grid for laying out your mockups. Includes the design and layout assets.
Berlin
Berlin Skyline
Envelope
A set of colored envelopes that you can use when modeling any messaging application, or anything that requires a message or snail mail. This can also be used to model an outgoing message from a Message Queue or communication between mail servers.
Tetris
Tetris blocks and Matrix