CSS3 Buttonize Framework is a new addition to this list which comes with styles for creating buttons in various sizes.
Icons can be used inside the items and there are ready-to-use classes for building disabled, striped or highlighted buttons and a panel/horizontal navigation.
You may be interested in the following modern trends related articles as well.
Here’s a preview of some of the buttons:
Google Chrome 10+
Intenet Explorere 9+