If you like for example on Apple.com/Mac you'll find the slider and the accordion and other things from YooTools. But it doesn't seem like them since they are a little different. Plus, I would doubt that Apple.com would run on Joomla too.
Does that mean that Apple's designers just created those cool Web 2.0 scripts to be cool on there site?
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What are YouTools: http://tools.yootheme.com/
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Wowzers.