This one is for all you interface sketchers. Wireframes Magazine asked designers what their favorite pens, pencils, and markers are for UI sketching, and posted photos of the responses. Click the first photo to view the expanded gallery of tools.
Dan Harrelson at adaptive path posts his updated list of prototyping tools. You can view the Google Doc directly here.
Via @andrewkorf
http://www.adaptivepath.com/blog/2009/09/16/rapid-prototyping-tools-revisited/
Version 3 of the OmniGraffle Wireframe Stencils has been posted. Download it now.
Modified all form and controls elements for color consistency. Added the following: sliders, new form icons, tag clouds and lists, a-z lists, IAB advertising units, iphone chrome, web browser chrome. You'll also see the start of a style guide based on the UI components here, which is being used for the Prototyping Kit we're developing.