They mention sketching as a form of rapid prototyping, and I do a lot of that. But lately I use a program called Balsamiq Mockups to sketch out my prototypes. D

They mention sketching as a form of rapid prototyping, and I do a lot of that. But lately I use a program called Balsamiq Mockups to sketch out my prototypes. Does anyone have a better system (or software) to recommend?