TransitBar is a simple app that lives in your menu bar and tells you when your next bus or train is coming. You can set TransitBar to show different lines at different parts of the day, so if you bring your laptop to work, you'll know exactly when you can catch the train home. TransitBar works with many large transit systems in the United States and worldwide.
Wineskin Winery creates Mac OS X ports/wrappers for Windows programs/games, with an easy-to-use GUI, integrated Wine, X11 and an installer.