Logitech Tablet Keyboard for Android
With the right keyboard, a typical Android tablet can turn into a full-fledged productivity tool. Logitech's Tablet Keyboard for Android is up to the task: The keyboard is comfortable and responsive to use and features a full set of Android-optimized function keys. It also comes with a protective case that folds out to double as a tablet stand.
Logitech's keyboard connects to a tablet wirelessly, via Bluetooth. The latest version works with both Windows 8/RT and Android; it is available from Logitech for $69.99. But you can still find Logitech's original Android keyboard at a few vendors.