Awake

It’s a digital alarm clock that uses music from your iTunes library to get you out of bed. Set repeating or one-time alarms, each with their own playlist. Alternately, you can use Awaken’s sleep timer to gradually fall asleep to your favorite music. Awake requires Mac OS 10.3 or later and iTunes 3.0 or later (note that iTunes v.4.0 or later is required to display album art with alarm notifications). There is a 14 day trial version available, and a single license will run you $8.95US.