Name: Balsamiq Mockups
Mac Platform: Intel
OS version: 10.7 or higher
More Info: http://balsamiq.com/products/mockups/
Using Mockups feels like drawing, but because it's digital, you can tweak and rearrange easily. Teams can come up with a design and iterate over it in real-time in the course of a meeting. Product managers, designers, developers, and even clients can now work together in the same tool to quickly iterate over wireframes, before writing code.
Focus on Content and Functionality:
Low-Fi Sketch Wireframes. Sketchy, low-fidelity wireframes let you focus design conversations on functionality.
UI Components and Icons. 75 built-in user interface components and 187 icons, plus a whole lot of community-generated components.
Click-Through Prototypes. Linking lets you generate click-through prototypes for demos and usability testing.
Export to PNG or PDF. Share or present mockups with embedded links using PDF export, or use a 3rd party tool to export to code.
And much more....