Dreamwhittler is an HTML and CSS optimizer. It compliments any web design utility, but has some advanced features for Dreamweaver*. You can visit the features page
for a full list of what Dreamwhittler can do.
Dreamwhittler is shareware, and is free to download and use.
The free version will insert a single link on the bottom of the pages of your site. You can see an example of the link at the bottom of this page.
If you register Dreamwhittler, the link will no longer be inserted.
*Dreamweaver is a TM of Macromedia.