Aurora simply put is an alarm clock for your mac, but its so much more then that. It is super customizable and is extremely powerful. You can set different alarms for everyday of the week. You can choose which playlists(from itunes) to wake you up(or just wake with a beep)... you can even have Aurora launch websites so when you get up everything you want to check (like news and weather) is already ready to go. It will even wake your computer from sleep or from being turned off. Highly recommended and its totally free! Check it out.