Network stencils
Free
Vmware Interface Icons
Icon elements of Vmware Infrastructure interface
Free
VMware vSphere
VMware icon and diagram library
Free
Watchguard
This is another Visio stencil converted to .gstencil. This includes several Watchguard security appliance/firewall objects.
Free
WebSphere MQ
Design Stencil for WebSphere MQ and Message Broker
Free
Whiteboard Icons for Distributed System Design
Whiteboard style icons that can be used to draw Distributed System design diagrams. T
Free
XING - Interface Elements
User Interface Elements for XING.com - Grids for Header and Home-View - Grids and Elements for boxed elements like "My Contacts"
Free
XRackPro2
XRackPro2 Omni Graffle Stencil for 4U, 6U, 12U and 25U Noise Reduction Enclosure, Noise Reducing Server Racks in Platinum and Black.
Free
Yaesu radios
Various Yaesu radios and a few connectors.