what is the best free wysiwyg editor available for download on the web?

Considerations include ease of use, bug-free, and not a lot of spam email from developer.

First, let’s assume you mean HTML editing or website building in general.

I’d strongly suggest you not use WYSIWYG editors for anything. They don’t actually help you learn anything. All you learn is how to use the program, not actual, decent site design. If you feel you must _start_ by using a WYSIWYG interface, I’d suggest checking out CoffeeCup HTML Editor. You can get a free version at http://www.coffeecup.com/free-editor/ , but I’d strongly suggest the full version sometime, if you can afford it.

The best thing would be for you to read some of the basic HTML help out there (a search for "Learn HTML" or "Beginner HTML" should do it) and spend some time looking at the source code of some sites you like the look of. Then see if you can duplicate some things you like in the WYSIWYG, but be sure to take time to look at the real code underneath. It’s surprisingly simple to use (X)HTML and CSS.

Once you have basics down, you will have plenty of additional help out there to get you moving along and can start authoring directly in a code editor or even just plain old notepad.