WireframeSketcher
WireframeSketcher is a rapid wireframing tool that helps quickly create wireframes, mockups and prototypes for desktop, web and mobile applications. It comes both as a plug-in for any Eclipse IDE and a standalone version. With WireframeSketcher users can quickly gather useful feedback from stakeholders, show off their proposals to clients, share their ideas with fellow developers and in the end build better software. Install the 14 days free trial and test it for yourself.