I don't know of any software, but there's a website: http://www.psd2html.com that does slicing for you and then converts it to xhtml/css, but you have to pay. If you have photoshop, you can splice using the splice tool, then convert the whole thing to xhtml/css, but it isn't very clean.
There are people who will do it for much less than that site. No software that I am aware of will do it for you properly.