iPad stencil
iPad stencil inspired by iPad GUI PSD by teehan+lax: http://www.teehanlax.com/blog/2010/02/01/ipad-gui-psd/ Update to the latest version of WireframeSketcher to make sure everything works correctly.
Updated iPhone stencil
A more complete iPhone stencil inspired by iPhone GUI PSD by teehan+lax: http://www.teehanlax.com/blog/2009/06/18/iphone-gui-psd-30/ Update to the latest version of WireframeSketcher to make sure everything works correctly.
Android stencil
This Android stencil is inspired by free Android PSD vector kit published here: http://www.smashingmagazine.com/2009/08/18/android-gui-psd-vector-kit/
960 Grid System
Templates for 960 Grid System with 12 and 16 columns. These are best used as master screens. Lock them in background and use snapping to align widgets against the grid.
iPhone stencil
iPhone stencil that includes Portrait and Landscape layouts, keyboard and common buttons.
Edit: There is now an updated iPhone stencil with more controls and UI elements.
