Toolsoft UI Mockup is a digital desktop, web and mobile UI mockup design software, helps you improve design efficiency and slash time to market.

Windows, Linux, Apple Mac Desktop UI mockup/prototype design.
Create user interface mockups and wireframes of a website.
iPhone, Symbian mobile phone UI mockup design.
Export snapshot of mockup to PNG file or clipboard.
Export/Import mockup in XML format.
Explore your mockup designs quickly.
Turn your ideas into visual mockups that illustrate how the idea might look.
Save time and work more closely with your clients using Softe UI Mockup.
Share your mockups with your design team.

http://www.toolsoft.net/ui-mockup.html