EasySleep
by LullSoft.com, Inc.

  EasySleep is a simple and easy to use timer software that auto shuts down your computer at a time period you choose. You may fall asleep easily while listening to your favorite music!

Features Include:

ShutDown - Shuts down the system and power off the computer (your system must support the power-off feature)

ReBoot - Shuts down the system and then restarts the system
LogOff - Shuts down all running processes, then logs the user off
BlackScreen - Black your computer's screen. Save the monitor's life!
Unique Feature

Diminuendo - Auto reduce the speaker's volume constantly

Related software:
auto shutdown timer, shutdown, timer, ...