You might be already knowing some of the awesome features of Windows 7 taskbar. But in case you want to run any application and does not want it to be shown in the taskbar, then you can do that with WinVisible. It is a freeware tool which allows you to hide any running application from the Windows 7 taskbar. This application helps increase your privacy by hiding selected applications from the task bar and showing them again with user defined hotkeys.
When you open WinVisible, it populates a list of all running applications and you can select the applications which needs to be hidden. Clicking on the Hide Window makes your application invisible. You can set the hotkeys to make application visible and invisible.
WinVisible is simple yet very useful tool to hide applications from taskbar. WinVisible sits in the system tray and you can open it from there any time.