Visage Login: Customize your Mac OS X login screen
Quickly and safely customize your Mac OS X login screen. Change the login window images, add a custom text banner, add an Acceptable Use Policy, display the current date and time, and more.
PowerController: iTunes alarm clock & sleep/wake scheduler
The best iTunes alarm clock for Mac OS X! Alarms can wake your computer from sleep, play any playlist in iTunes, and gradually increase the song volume. PowerController runs in the background and is configurable through System Preferences, so you won't have another app hogging dock space!
Visage: Effortlessly Customize your OS
Visage allows you to easily and safely customize the appearance of your Mac. You can run screen savers as your desktop background, customize your login panel, personalize system alerts, and more! Visage keeps track of Apple's default settings for every
customization, so you can easily switch back to the original settings at any time.