Hourglass - Hourglass is the most advanced simple countdown timer for Windows.
LaunchControl - The launchd GUI
Free Countdown Timer - Free Countdown Timer is a free, full-featured and user-friendly countdown timer for Windows
MSConfig - Describes how to use the System Configuration utility (MsConfig.exe) to troubleshoot errors that may prevent Windows Vista from starting correctly.
SnapTimer - SnapTimer is a simple, free, portable countdown timer for Windows.
Startup Delayer - Startup Delayer gives you the power to optimize your Startup Process by delaying applications from starting up as soon as you log into your computer. By delaying the applications during start up, your computer becomes usable a lot faster.