The Yahoo Developer’s Network has made available a free package of graphics stencils (templates) in Vector, PDF, PNG and OmniGaffle formats. Included in the package are templates for:

  • Calendars
  • Charts & Tables
  • Control Elements
  • Form Elements
  • Menus & Buttons
  • Mobile Phone Graphics
  • OS Window Elements
  • And more

You can download the package here.