DW is a very expensive editor, especially if you consider all the powerful text editors that cost nothing. Even if you include its site management tools, they are all available elsewhere at no charge. I'll talk about that below.
Beer ??? I searched never found a editor called Beer ? And Vi is that only for Mac ? I've ruled out Simple CSS out of the circle.
There are two types of free. Free as in speech applied to software means you are free to do with it what you wish. Free as in beer means it doesn't cost you money.
[Vi(improved) is a very powerful text editor available for [url=http://www.vim.org/download.php]Unix/Linux, PC: MS-DOS and MS-Windows, Amiga, OS/2, Macintosh, and others](http://www.vim.org/about.php). Any POSIX standard Unix or Linux (OSX?) installation is guaranteed to have Vi; that includes the vast majority of web-server OSes.
Emacs, my favorite, is an extremely powerful text editor. It is available for more platforms than you knew existed. I won't even try to tell you what all you can do with Emacs. Instead, take a look at this guided tour of Emacs capabilities. By comparison to the robust power of Emacs, editors like Notepad++ are tubercular three year olds.
Don't be put off or intimidated by Vi's and Emacs's power and learning curves. You only need to learn the little bit you're using. Before very long, you'll be taking more and more advantage of the power and productivity at your finger tips.