Publisher's description - Contact Alerts for Skype 1.0.1
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Contact Alerts for Skype is a simple and easy to use Mac OS X utility that will automatically notify you when your selected Skype contacts come online.
Contact Alerts for Skype launches automatically on startup and will monitor your Skype contact list so you don`t have to.
NOTE: Contact Alerts for Skype can only be purchased via the Mac App Store (the buy link redirects you to its App Store page). To purchase/download applications via the App Store an Apple account is required.