Editor: Give transparency to almost every visible window of your running applications, or make your taskbar transparent at a desirable level.
TransApps is a systray application with two features:
The Transparent Applications feature, from were you can make any visible running application's window transparent (which means the applications that appears on the taskbar), selecting from a panel of transparency level buttons.
The Transparent Taskbar feature, from were you can make your taskbar transparent, selecting also from a panel of transparency level buttons.