What Tools Do You Use for UI Prototyping?

AccUser asks: "There are many articles discussing methods of UI prototyping. Having been involved in the design and implementation of a number of commercial applications (both desktop and embedded), I know the value of producing early prototypes of the UI. In the past I have used visual programming tools, such as Visual Basic, but there is always that request: 'Can't you just complete the prototype and release it?' One project I was involved with, the UI prototype employed hand drawn graphics (including hand written text labels, etc) in order to be explicit about the fact that it was a prototype. What I would like to know is what tools and techniques do you use for UI prototyping, and how do you manage your client's expectations?"

VB prototype becoming final product

[dtfinch]

They call that RAD.

Flash

[TheMysteriousFuture]

Flash. No seriously, give it a shot

I...

[Jeff DeMaagd]

use chalk on cave walls, you insensitive clod!

Re:My suggestion

[Smallpond]

Cut and paste is more fun this way. Especially if you like to eat the paste.

Make a Clay Model Prototyping Another Product

[rewinn]

... such as a Car, a Shoe, a Candy Bar or an iPod.

Then respectfully ask "Can't you just complete this prototype and release it?"

Some will get it. Some won't.