A few weeks ago, some people said that SharePoint Designer will be free. Now it is official. You can download SharePoint Designer as a free tool.
It is really a good news … ‘til you let experimented users to use it. SharePoint Designer should be used in a structured infrastructure if you don’t want to correct errors because of risky customization.
Download page: http://www.microsoft.com/downloads/details.aspx?displaylang=en&FamilyID=baa3ad86-bfc1-4bd4-9812-d9e710d44f42