And your question is....?
You want to get som ideas what tools others use? Try WebMatrix with PHP
], or Eclipe PDT
You want to know what are the best practices in table-less layout? Start here: http://kyleschaeffer.com/development/all-about-tableless-column-design/
Just to assure you, making tableless layout is not a wysiwyg thing. You will hardly find any tool, that will do the work for you, but you can use IE Developer Toolbar or Web Developer (for Mozzila and Chrome) to fine-tune css in-vivo.