Popular stencils
Java App Server Logos
These logos/icons were made for use in diagraming enterprise java application environments with non-heterogenous architectures.
Enviromux
NTI Enviromux and a collection of sensor icons
McAfee Endpoint
McAfee labeled stencil for creating McAfee diagrams in OmniGraffle.
AWS VPC Icons
AWS Simple Icons for Architecture Diagrams from http://aws.amazon.com/architecture/icons/ converted to stencils.
AWS Icons: Networking
AWS Simple Icons are an official icon set that includes icons for several AWS products and resources. Customers and partners are permitted by AWS to use them to create architecture diagrams. The icons are designed to be simple so that you can easily incorporate them in your diagrams and put them in your whitepapers,...more
Storage Networking - Cisco MDS 9000
Cisco SAN - Storage Area Network Cisco MDS 9000 Family
Juniper J series stencils
Stencils for Juniper J switches. Sized for 19" racks, works well with RackElements
Diagrams for categories
Basics for making mathematical diagrams in category theory, abstract algebra, etc.
Sun Microsystems: Tape Backup
This stencil contains tape backup equipment from Sun Microsystems.