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Flip 'N Drink

Somehow developed in Tahoe, this iPhone App's got hundreds of painstakingly crafted drink recipes from big-deal barmen (Gary Regan, Robert Hess, Dave Wondrich, etc), plus "all the classics". Each cocktail features detailed ingredients/instructions, a brief history, and "If you liked this, you'll love..."-style links to other concoctions, i.e., if you dug the gin/maraschino/orange Casino Royale, you might like either the Aviation or Floridita 1930 (and will definitely hate Quantum of Solace).