Frame Box – Easy Frame Sharing
http://framebox.org/

Lightweight online tool for creating mockups. Show what you need in three easy steps: 1) Sketch frame using UI units, 2) Save it and get a link to created frame, and 3) Send a link to your companion. This has been added to the tools section of Research Resources Subject Tracer™ Information Blog. This will be added to Entrepreneurial Resources Subject Tracer™.