Proof
We suppose it was bound to happen sometime. Proof (Free) is — ahem — proof that social drinking games can elegantly make the transition from card table to tablet. Optimized for the iPad, Proof is a web app that takes players on a virtual tour of Scotland through the tasty — and tipsy-ing — world of single malt scotches, requiring each player to provide tasting notes while learning about the regions where they come from. Sounds like a great way to spend a cold, dreary Friday night.