W3Schools is the best website for html help and everyone should use it, it is superb in everything and the user can even try the code on the website to understand how it works. Overall its a good source to learn html and is for new users and old
HTML Goodies is ok but not nearly as good as W3Schools it has things that will help you but you cant try it for yourself. Not to mention the website has annoying advertisments and the web page has tricky navigation, but if there was no ads and tricky navigation the website would be pretty solid.
Computer Hope is meh not bad but not good, there is a very thin line between the two. the website could have a lot more content and the presentation is bland, some instructions are unclear but some are helpful. Overall this site is ok but could use a lot more work.