This is the most useful resource out there for the casual wine browser. Search for a wine and you will be connected to professional and user-generated reviews from CellarTracker, the world's biggest bottle-management site. You can scan the bar code on a bottle and bring up the information, get price comparisons, keep track of your personal wine inventory after you make purchases, or find a wine store, bar, or winery nearby. Simply put, it is the most comprehensive of the all-in-one wine apps. [$3; iPhone, Android, iPad]