I’m doing some website design and I found some helpful tools.
RoundedCornr can help you create rounded corner elements in your page. It also makes rounded buttons and tabs.
colorcombos helps you pick your website’s color scheme.
There is also some useful sites that list several tools that can help you:
Web 2.0 Design Generators For Developers: “a handy list of online tools to help you save time and effort creating nice graphics for your sites or apps.”
25 Rounded Corners Techniques with CSS: “some quality and usable rounded corners with CSS techniques for you to have the best choices.”