Popular stencils
Juniper SSG
Juniper SSG firewall devices. SSG5, SSG 20, SSG140, SSG500 and SSG500 PIMs.
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.
Xbox 360 controller
This is a stencil for the Xbox 360 controller. It's very helpful if you need to do game control design.
Pyramid
Customizable 3D pyramid
Google Glass Cards
A collection of Google Glass cards and design elements to aid the design process.
AWS Monitoring Icons
AWS Simple Icons for Architecture Diagrams from http://aws.amazon.com/architecture/icons/ converted to stencils.
Failure Modes and Effects Analysis
Nice, clean template for FMEA analysis. Beats the usual PowerPoint rendering.
Generator-Elec
A collection of symbols I put together reworking an Onan generator wiring diagram
Name badge
A stencil for generating name badges or other badges of a similar style.