Microsoft Expression Web Designer

    snip>>>Microsoft Expression Web Designer.

    Expression Web Designer is currently available in a free
    beta version called a Community Technology Preview.

    Expression Web Designer allows you to:

    Create CSS-based, XHTML 1.0 Transitional--conformant web
    sites by default and work better across browsers,
    simplifying deployment and maintenance. Configure flexible
    schema settings to support all combinations of
    HTML/XHTML/Strict/Transitional/Frameset and CSS
    1.0/2.0/2.1 in addition to browser-specific schemas.
    Validate your site with Compatibility reporting and use
    the Accessibility report to verify your site against
    Section 508 and W3C Content Accessibility Guidelines

Microsoft Expression Web Designer.