What's your favourite design / development program?

As I've never created a poll before I thought I'd try it out here. In response to a comment I received regarding my post 'Web design Good Practice - the basics' [09/02/07] that disagreed with me that Photoshop is probably the most used program for creating web layouts I thought I'd find out. Please feel free to complete this simple poll and add any comments if you want to expand on the subject.