While themes aren't exactly all about productivity, strictly speaking, it never hurts to spice things up a little bit and make your workspace a little friendlier. To that end, Google Chrome's new Theme gallery adds a little spice to your Chrome installation.
You'll need to be using Google Chrome 3 to install any of the themes, and doing so is as simple as clicking the Apply theme button for any of the visible themes. We've verified the themes as working on both Windows and OS X, and presumably they should be working just fine on Linux, as well. Thanks cjk1171!
Google Chrome Themes Gallery [Google]