The Ant is an affordable and reliable solution. It's their word processor, most likely Microsoft Word.
Most word processors have some HTML capabilities.
And Microsoft Word is no exception. With these add-ins, you get the power of Word's numerous functions and the ability to create Web content in a familiar environment. This power comes at a price. The HTML produced by Word is, to put it bluntly, junk. It's not standards-compliant code by any stretch of the imagination.