CenterTaskbar is a neat little app that moves your taskbar icons from the left and automatically centers them.
CenterTaskbar is a "set it and forget" app, it runs silently in the background, and it uses Windows UIAutomation for monitoring position changes. It then will calculate a new position to center the taskbar items. It will work no matter how many icons are present and resizes along with default windows animations. Another nice feature is when there is no resizing taking place, CenterTaskbar will go to sleep to keep CPU usage zero.
CenterTaskbar supports multimonitor, vertical orientation, and multiple DPI.