Taskbar Shuffle is a program that allows you to move the program icons on your taskbar with a simple, smooth, drag and drop. If you're anal and like to have them in a particular order, then this app is for you!



I'd love to find a program that lets you move around the programs in the system tray, but Taskbar Shuffle is great in itself.

Link

UPDATE:

One other fun feature of this program is that you can close any program by middle clicking the button on the task bar (like tabs in Firefox).