Growl 1.1 - Notification system for OS X apps. (Free): "
Growl 1.1
Growl is a notification system that allows any application to send it a notification, and then it displays it. You can (for example) be notified that you have new email, or that a download completed, etc.
Support for Applescript, Perl, Python, TCL, Cocoa, Carbon, Ruby and more being added.
MacUpdate - Universal Binary - http://www.macupdate.com/macintel.php