There’s also 1Mobile Market for PC and tablets - all you need is an emulator and you’ll be running your favorite Android apps on a larger screen.
Note that the minimum system requirement is Android 2.3 OS and that you need to enable 'unknown sources' in your settings if you wish to install it. 1Mobile Market store is one such option, a free alternative to the official Android marketplace.
While iOS users can only get their apps from the iTunes app store, those with Android devices get to enjoy several excellent options.