Oops!
Oops! is a free network enabled multi-player board game designed exclusively for Mac OS X.
Algernon
Algernon is a productivity tool for Squeak Smalltalk programmers — your own personal assistant. Inspired by Quicksilver and LaunchBar, Algernon aims to make programming in Squeak faster and more keyboard centric. It provides lightning quick access to any class, method, morph, or global variable, and even gives you a quick way to evaluate Smalltalk expressions.