Question: According to the Netbeans site (http://netbeans.org/features/javascript/index.html), Netbeans can be used for "Developing with HTML, JavaScript, and CSS". However, the IDE does not ship with a project type just for this. Instead, there is a project type for PHP or (if you have a release before 7.0), Ruby etc.
However, I just want to create a rich web application with Javascript/HTML/CSS. Perhaps there is a plugin for such a project type?

Answer: 
As far as I know, there is no plugin to create HTML project or General project (as in Eclipse).
But for this I use **Favorites** tab:

1. Display tab Favorites Windows >
Favorites
2. Find your directory for your html
project
3. Right click to directory and choose
"Add To Favorites"

![enter image description here](https://i.stack.imgur.com/95xrp.png)
If your still looking you could try this plugin:
<http://weblogs.java.net/blog/timboudreau/archive/2006/08/netbeans_module.html>