Popular stencils
iOS UI iPhone
iOS UI iPhone stencil from the iPad and iPhone Design bundle.
Direct Logic 05/06 Options: Communication & Speciality
Here are the communication and specialty module symbols for the DL 05/06 chassis.
Cricket Scoring Symbols
All cricket scoring symbols that are described in Tom Smith's "Cricket Umpiring and Scoring" book can be found in this stencil.
Clefs, notes
Clef de sol et clef de fa
Cisco CCA and ISE
Cisco Clean Access and Identity Service Engine icons.
Synthetic Biology Open Language Visual (SBOL Visual), version 1.0.0
Stencil corresponding to symbols from SBOL Visual 1.0.0. Useful for creating diagrams of synthetic biology pathways and circuits. See description provided in BBF RFC 93 (DOI: 1721.1/78249). Please note that all credit for this stencil goes to the authors of BBF RFC 93. I've simply uploaded this stencil for convenience.
Direct Logic 205: CPU
Direct Logic 205 CPU's. 8 of 12 stencils.
ROOM Modelling Language
Basic Real-Time Object Oriented Diagramming Symbols
RoboMind graphics
some graphics from robomind (http://www.robomind.net/en/), which is software specifically developed to support technology education. you can now build robomind maps directly in OmniGraffle.