Board games on the iPhone

Hive, based on the game by John Yianni, uses hexagonal tiles in a turn-based, insect-themed two-player game that's a cross between chess and dominoes.

iGo replicates the ancient strategy board game with variable board sizes, increasing levels of AI, and multiple game saves.

Scrabble also exists on the iPhone in a very good version from EA, but Words With Friends can host many simultaneous games online and has a free version.

Klaus Teuber's classic game, The Settlers of Catan, finally comes to life on the iPhone, although without online multiplayer and none of the expansion sets.

Simple and very addictive, Mancala is ancient game that plays out like checkers or backgammon. Flipside5 has two versions, one of which is free.