Barnes & Noble's Nook readers are top notch -- there's no argument about that. The application part of that equation however, is pretty messy. The web app is integrated into the B&N site and keeps the UI clean and minimal. The Mac and PC clients on the other hand go with forest green highlights, grays and a busy sidebar for navigation, while the Android and iOS apps get bright blues and lots of gradients. And lets not even bring the Nook Tablet and
