When your multi-tasking and want to know the status of an App, that’s running in the background.You will have to switch windows, but with Growl is a notification system for Mac OS X: it allows applications that support Growl to send you notifications.

Notifications are a way for your applications to provide you with new information, without you having to switch from the application you’re already in.

Features :

1. Complete control over which notifications are shown and how they are displayed.
2. Centralized notification preferences for easy management.
3. It starts with system start-up.
4. Notifications can be emailed to you or spoken instead of displayed on the screen.

Growl also has many more styles that can be downloaded from here.

Check out the list of applications that support Growl.

Check out more screenshots of Growl here.

Growl : Download || Supported App’s || Download More Styles for Growl