Two new layout tools have been released to the market, except these tools are free, and web-based: A 3 column CSS layout generator (float-based) and a 3 column CSS layout generator (absolute positioning).
These tools allow you to adjust major settings in the layout, and provide you with the finished code to copy and paste when the layout is to your liking.
Both generators produce Netscape 4-compatible CSS (for those of you still unable to wrestle free of its wretched grasp), and both incorporate a header and a footer into the layout.
(via Zeldman)