I received this email about my post on wireframing from a friend:
Paul, I read on your blog that you wanted to know a program for wireframing. Visio by Microsoft is the “professional standard”, but there is an open source replica called Dia http://dia-installer.sourceforge.net/
I personally like the simplicity of Macromedia Fireworks. I know it isn’t free, but it is easy, and the vector graphics makes it great for beginners and has a much smaller learning curve then Visio or Dia. But if you want to go open source then Dia is the way to go.
Meanwhile, I took the suggestion of one of my readers and tried Microsoft Publisher for wireframing and quickly abandoned that. Then I downloaded a free trial verion of SmartDraw, which looks very promising, not only for simple wireframing, but also as a multi-purpose tool for doing org charts, flow charts, and dozens of other types of visual charts. I’m working on my first wireframe site design and so far the tool is easy to use.