What a more detailed ui breadboard tool to use, rather than balsamiq

Question

I am currently using balsamiq for ui mock ups, but sometimes this does not give me the details that I need for more specific functionality. I want to show. e.g. error messages, check.

Is there a similar, easy-to-use tool that allows you to customize more than dragging balsamiq?

(I still plan on using balsamiq for simple layouts, as I like it, quick and easy to use)

Answer 1

, , , , Balsamiq , .

Answer 2

, , Expression SketchFlow

Answer 3

Have you checked iRise? It is pretty cool, not cheap.