Microsoft Office 2007 SharePoint Designer is a must-have tool for any SharePoint Developer. In a March 30 2009 Letter to customers, the Microsoft Office team has announced the move to make it completely free:
I originally thought the announcement may have been an April fools joke - but that is not the case... so download it and enjoy.
You can download it from here:
What I'm really hanging out for is when the generous guys at Microsoft could make the other Office 2007 products free too... :o)
We can live in hope.