If you are a webdesigner and make websites, you couldnt possibly do without Dreamweaver.
It is wonderful for amateurs and advanced guys alike, helping you make WYSIWYG pages instantly.
The Dramweaver extensions and the new Exchange help you get such scripts for dreamweaver that make life really wonderfull.
You can do all those fancy DHTML effects and that flash manipulation right in dreamweaver with javascripts. Integration with Fireworks allows making graphics out of things like spacers, text a breeze. Also the inbuilt options like Form validation, error checking, optimising HTML, spell checking make it the BEST HTML editor right now.
Site management with local servers and uploading via FTP is also available.
Auto checking for links sitewide, autoupdation of template using pages and items from the library.
You even have complete control over the HTML code through the code browser. The Oreilly Reference guide comes in handy even for the experienced web designers.