There’s several good applications for creating UI mockups out there. You have Balsamiq which is probably one of the most famous, but the pricing has always been a barrier for me – even if it’s very reasonably priced.
I was looking around the web for a good alternative today, when I suddenly bumped into Mockingbird. Mockingbird is a free browser based UI mockup application – no flash or other plugins required. After registering an account and playing around for a bit I suddenly realized that this was in fact a quite powerful, free UI mockup tool.
Although not the most advanced, Mockingbird has most of the UI components you will need and it provides a clean intuitive interface for quickly getting a draft of your new website or application up and running. In addition to providing online saving of your mockups, it also provides exporting to PDF and PNG making your mockups easy to distribute and include in presentations and documentation.
This one will definitively be easily accessible in my toolbox from now on.
What UI mockup tools do you use?