Popular stencils
AWS Messaging Icons
AWS Simple Icons for Architecture Diagrams from http://aws.amazon.com/architecture/icons/ converted to stencils.
Web Sketch Cursors
CSS3 Compliant cursors in a "sketch" style, for mocking up web UX designs. Includes: default, crosshair, pointer, move, text, wait, help, progress, not allowed, vertical text, and several resize arrows.
Neutrik F-XLR D Series chassis mount
Neutrik F-XLR D Series chassis mount with drill order to scale.
Lab Glassware
Laboratory glasswares, Use for SOP and work-flow. Distillation equipment including condenser, distillation flask, collecting flask, thermometer, Steam inlet and steam generator.
Neutrik BNC NBB75DFIB chassis mount
Neutrik BNC NBB75DFIB chassis mount with drill order to scale
WindowsPhone 7 Controls
Replication of most of the controls for WindowsPhone 7. Probably could be optimized more but thought I'd share in the current state as it may be useful.
Scrum Board
A small stencil with scrum/work stages and yellow stickies for tasks. Allows creation of an image of an agile scrum board for work tracking.
Simple Rack Elevations
Basic stencil used for documenting rack elevations
Audio Symbols
A general-purpose set of shapes for audio technology.