Great for users wanting a unique theme but lacking the knowledge in coding or design skills, I have compiled a list of all the WordPress Theme Generators I could find:

WP Pal

WP Pal looks very impressive unlike the others this one has multiple theme layouts to choose from that you can use as your base theme to begin customising. With options of suggesting additional themes.

WP Theme Gen

Possibly the first WP Theme Generator, comes with a simple base theme to get started with many options for customising, well laid out and very easy to follow.

WordPress Theme Gen
This one is a stand alone application for Windows, I personally haven’t tried it yet, but it looks very interesting.

Out of the above I’m most impressed by WP Pal, in the fact you can choose from multiple layouts for your base theme, although limited at the moment, once they get the ball rolling this could be an invaluable source for creating quick and easy custom themes for the novice.