Flipboard left the exclusive confines of iOS and came to Android in 2012. A free aggregation app for your favorite news services and social sites, it retrieves articles from online publications and popular social services such as Facebook and Twitter. The beauty of Flipboard is its swipe-friendly magazine-style UI -- simply "flip" through the pages with a swipe of the finger to move to the next page of articles. Flipboard displays posts and photos shared by your Facebook friends too. One bummer: the Android app is optimized for smartphones, not tablets, although a tablet-specific version will likely emerge as Android slates gain ground.