HotDog is a stand-alone program. This means that it doesn't need an expensive word processing program to run. It also means that you can deal with your HTML documents directly, instead of having to "pretend" that they're standard word processor documents.
HotDog offers many ways to making creating HTML documents easier. If you are an experienced HTML author, you can type all the formatting tags directly, or select them from menus and pop-up lists. If you are new to HTML, HotDog has screens to let you insert images, formatting, and hypertext links into your document without having to learn the HTML language.