Wizard style website engine? Options

[davesmith1234]

I've been looking around for a pre-developed wizard engine I could use for a couple websites. What I mean is, I'd be able to ask certain questions and drive results based on if / how people answered. Very similar to Turbotax or something like that where they don't waste time asking questions that are not applicable, etc.

Anything already commercially available? I can't believe I haven't been able to find anything. Thanks!