How can I create custom Html or Css boxes? What would you call those boxes in the link? Any free online generating tools to create something with gradients, any help is appreciated.

I think you need to explain a bit more what you want. Are the boxes to be part of a website, or are they supposed to pop up in the middle of a page? What do you want them to contain?

Boxes are made up by using html, styled with css and sometimes with some behaviour created with jquery.

Maybe you could post a link to a site that has the boxes you are interested in?

If you use Firefox, give this a try, it has more than just gradients:
https://addons.mozilla.org/en-US/firefox/addon/csssir/

In RSD, you can choose background properties:
"The last background image option is to use a linear gradient. Up to 4 color variations can be picked. For each color you can specify where it stops (and the other begins). The direction of the gradient can be defined using degrees; 180 degrees goes from top to bottom and 90 from left to right."

This page explains how to add HTML/CSS and scripts to your pages:
http://www.coffeecup.com/help/articles/ … -designer/

You should have a read through here to see all the things you can do with RSD:
http://www.coffeecup.com/help/articles/ … lp-manual/