Wufoo : Create beautiful, professional HTML forms quickly and without code
Wufoo is an Internet application that helps anybody build amazing online forms. When you design a form with Wufoo, it automatically builds the database, backend and scripts needed to make collecting and understanding your data easy, fast and fun. Because we host everything, all you need is a browser, an Internet connection and a few minutes to build a form and start using it right away.
It’s pretty slick. I see it not only being useful for creating real forms, but for easily creating mock-ups/wireframes/etc. Give it a whirl!