Google Mail (lets face it.. its awesome) has gone even quirkier, releasing a bunch of new themes for you to customise your inbox. If you log into your account, you can change the theme in the settings -> themes tab.

There are themes that change with the weather (you input your location and it tracks local weather reports, weird little character ones and some simple colour redesigns for the exisitng blue theme. Plenty to choose from, so get customising your Mail box!