Favored Freeware: Quinn

Quinn is a clone of Tetris.

Quinn is an implementation of the popular arcade game Tetris, written specifically for MacOS X. It features a neat user interface, perfectly integrated with Aqua, and a smooth look and feel for best user enjoyment. The goal was not to reinvent Tetris with yet another modification of the rules, but to stick close to the original implementation. Still there’s everything one might expect, including a personal highscore for each player, configurable keys, and network play with Rendezvous support.

Pros: Quinn is the best Tetris clone available for MacOS X.

Cons: None significant.