Sleeper

Sleeper is a shareware control panel for classic Mac OS. However, it was never updated for Mac OS X.

Features
Sleeper offers an alternative to the Energy Saver control panel with more specific controls:
 * Hard disk sleep
 * Energy Star monitor support
 * Password screen locking
 * A very frugal screen saver
 * Timed sleep and shutdown
 * Configurable hotkey options
 * Support for the Sleep command in the Finder's Special menu
 * Kaleidoscope and Mac OS 9 compatibility
 * PowerMac-native support for both IDE and SCSI disks
 * Support for multiple IDE and SCSI buses
 * Full SCSI Manager 4.3 compliance
 * Balloon help