If you're a Firefox user, you may already know about this. Perhaps you have the plugin "GreaseMonkey" installed. All the same extensions available for that plugin, mostly all work in Google Chrome as well. Simply head on over to Userscripts.org: Power-ups for your browser and search away! The extensions integrate seamlessly with Chrome, and don't require any extra plugin. It is worth noting that not all the same extensions will work, as some are only designed for Opera or Firefox.