Balsamiq Mockups is a nice application to easily design mockups for you applications. There’s on little difference to the majority of similar tools I’ve seen: it doesn’t try to come out with a realistic image. That always makes the client think that you’re almost done, when It’s not always true. So it sticks to a rather sketchy design while representing the same thing.
Take a look at the Web preview, and you’ll see how it works.
