For styles in jQuery applications you can use the jQuery Theme Roller which is available for free online. This is a very cool tool as it allows you to customize the appearance of jQuery tabs and accordions exactly to your preferences before importing it with a few clicks into WordPress. Video
- Open this page.
- Clicking on Roll Your Own allows you to define a new style from scratch.
- Click on Gallery to use a predefined theme.
- Next, you have to download the theme. In doing so, select the most recent version (currently 1.9.2).