mozCC is a Firefox extension which allow to examine Creative Commons licenses embedded in web pages. When a CC lisense is found the (CC) icon is displayed in the statusbar then the extension parse the lisense information and display it as small icons. In this example from left to right icon means : Requires Notice, requires ShareAlike, prohibits CommercialUse.
You can also double click on the icons to display a window which resume page that have been parsed and the RDF segments. The current version is 1.1.0 you can get it from here
