Winkiller 3 can minimize to your system tray. WinKiller it's just a small red button in your taskbar.

Click on it and your system will restart or shutdown.
LClick - Shuts down the system to a point at which it is safe to turn off the power.

All file buffers have been flushed to disk, and all running processes have stopped. RClick - Shuts down the system and then restarts the system.