When you have 20 applications running on your system, it is very hard to manage as those windows will cluttered on your taskbar. You can use this utility to minimize your application to system tray instead and make your taskbar more organized:
TrayIt! allows to save precious Taskbar space for minimized windows. For each application which applies TrayIt! it creates a small icon in the System Tray. (System Tray area is located near the Clock). When application’s window is minimized this icon represents the application on the Taskbar instead of the regular “minimized rectangle”.