This is nothing different from a document file, but you can work on it to publish on web directly as a web form template. This one is the latest feature of word. You have several integrated programs to improvise your templates in terms of visual appearance. You also have the option to work with the add_ons in MS word. If you work wisely, you can bring out a professional template all by yourself.
Now, you have thousands of free document templates that can be turned into web forms. What you need is, open MS word. Then you will need to go to your title bar and move to file. Here you have several existing templates to choose from. You can choose anyone among them and modify them according to your needs. Apart from changing the forms, you can start with a scrap or, blank template.