Growl

Growl is a notifications system for Mac that allows a number of different programs to show status notifications on your screen.

This keeps users from having to open specific program windows to check the progress of a given task.

Once installed, Growl is added to the list of items in your system preferences and lets you choose which applications can show notifications, as well as what content they'll display.

Growl comes with several different templates so you can choose how notifications look. To download more templates, you can visit this download page.