You can save every Word file as HTML page. Note that recent versions of Word also support the concept of hyperlinks. This is only appropriate for very small and basic projects.
like Frontpage, Dreamweaver, GoLive, WebEditor, NetObjectsFusion,or HotMetal, or Hot Dog, allow you to create Webpages without writing HTML code. They usually are WYSIWYG programs ("what you see is what you get").
Good Text editors, like NoteTabLight help you considerably with the task. Here is even a HTML editor on the net.
Note however that every feature you achieve with the help of all these programs you can also obtain by typing tags into your source code. All these programs also create just source code.