Aptana Studio provides a DOM outline of your HTML code. This breaks down you code into the tag sections and this is great for checking out the element hierarchy of your HTML documents.
You can choose to use Aptana Studio to directly access your server through FTP. If you prefer to work off a shared repository, Aptana studio offers support for subversion, Git, bazaar and other code sharing and collaboration services.
Anytime as you work you can always check out a live preview of your work by using the tabs at the bottom of the editor and see how your work looks in different browsers.