Taskbar Shuffle is a simple, small, free utility that lets you drag and drop your Windows taskbar buttons to rearrange them.

* Reorder your taskbar buttons by dragging and dropping them
* Reorder your tray icons in the same way
* Reorder tasks in a grouped button's popup menu in the same way
* Middle-click to close programs on your taskbar
* Works with UltraMon taskbars
* Tweak taskbar button grouping