These are military map symbols. They probably don't make a lot of sense unless you're making military plans.
Soccer field layout useful for coaching and teaching, setting up game lineups, practices, etc.
If you yearn to cover your user interface with glass icons and buttons, here is a set you can use. The reflection, icons and backgrounds are individual Omnigraffle shapes that you can manipulate using Omnigraffle's colour and gradient tools. Being vector shapes, you can scale these to any size. Please note: If you do scale...more
Here is a range of North Points for use with architectural plans and maps. Some sparrows made their way into the stencils as well.
Port of the Flags library from http://www.famfamfam.com/lab/icons/flags/
The icons from famfamfam.com as an omnigraffle stencil.
A nice combination of sinusoid shapes (derived from trigonometric functions).
A Stencil set of common crochet stitches
I have imported a few shapes from Visio into OmniGraffle and created a stencil of them. It contains a curly brace, a number of cloud shapes, and a number of block arrows.