“This article focuses on actual wireframing tools and standalone applications, as well as resources that you’ll need to build your own wireframe: wireframing kits, browser windows, form elements, grids, Mac OS X elements, mobile elements, which you’ll use in any typical graphics editor such as Photoshop or Illustrator”…
50 Free UI and Web Design Wireframing Kits, Resources and Source Files - Smashingmagazine.com
