Popular stencils
Endian UTM Product Family
Stencil of Endian UTM product family. Ideal for creating physical diagrams.
Simple Wireless Network
Elements of simple wireless network and/or cloud architecture.
HP 7000 Series
HP 7102dl and 7203dl series routers with some modules
Nortel Networks
Modular and normal L3/L2 Nortel Network switches
Cisco CVD 2014 LAN Switching Icons and Clouds
Cisco released updated CVD Icons in many formats, but of course, no Omnigraffle stencil. These are built from the PNGs. http://www.cisco.com/c/en/us/solutions/enterprise/design-zone-smart-business-architecture/cvd.html This is the LAN Switching Icons and Clouds section.
Burndown template
Burndown template for Agile methodology
Swimlane
Multi-system flow-chart for business process or system integration diagrams. Each swim lane contains processes, flows and decisioned owned by a single entity. Flows that cross swim lane boundaries indicate integration points between entities (business processes, systems).
Essence Kernel
This is a stencil for the Essence Kernel framework.
Blackberry Tablet Stencil
Blackberry Tablet user interface components from the Blackberry Stencil Kit.