Android: Google's keyboard is a pretty great default, but it still lacks some features of third-party offerings, like themes. The latest update to the keyboard changes that. Google Keyboard 5.1 -- which can technically be installed on versions of Android as old as Jelly Bean -- contains a new theme engine. This allows you to pick from a variety of themes, including different colour schemes for the keyboard, or selecting a custom background image. 5.1 also comes with a new set of emoji from the Unicode 9 update, but unfortunately, this is limited to those on the latest Android N Preview. To try out the new themes, grab the APK from the source below.