What is Wufoo?
Wufoo strives to be the easiest way to collect information over the Internet.
Our HTML form builder helps you create contact forms, online surveys, and invitations so
you can collect the data, registrations and online payments you need without writing a single
line of code.
via wufoo.com
Wufoo, now with rules. If you need a simple way of creating forms that are a little involved, such as hiding fields based on previous input, then this might be a useful first stop for getting up and running.