Creating Custom stencils for Omnigraffle ( the right way )
Recently I have been using Omnigraffle for creating wireframes. I like using Omnigraffle because it offers a lot of flexibility in terms of styling the wireframes, while being quite simple to use.
Another great thing about Omnigraffle is the Graffletopia stencil library. This extensive resource includes many commonly used design elements and icons – you can download it from http://www.graffletopia.com.