Balsamiq Mockups is a rapid wireframing tool that reproduces the experience of sketching on a whiteboard, but using your computer, so they’re easier to share, modify, and solicit honest feedback. Mockups look like sketches, so you won’t get distracted by little details, and can focus on what’s important instead.
You can download a fully-functioning trial version of Balsamiq Mockups.
You can start a free 30-day trial for myBalsamiq, our web app.
Listing updated February 2012