Balsamiq. Rapid, effective and fun wireframing software. | Balsamiq
Balsamiq Mockups is a rapid wireframing tool that helps you Work Faster & Smarter. It reproduces the experience of sketching on a whiteboard, but using a computer.
Making mockups is fast. You’ll generate more ideas, so you can throw out the bad ones and discover the best solutions.
Source: Balsamiq. Rapid, effective and fun wireframing software. | Balsamiq