'Jedi Window Dock', and 'Taskbar Shuffle'

Jedi Window Dock

Dock any number of applications inside of a tabbed window. You can dock all your putty sessions together, put all of your instant message conversations on tabs, or perhaps you manage a ton of remote desktop sessions All of these windows need not take up space on your taskbar any longer! Software Jedi to the rescue. Any application, with the exception of console apps, can be docked.

http://www.anappaday.com

Taskbar Shuffle

Reorder the programs and buttons on your taskbar exactly how you like.

http://www.freewebs.com/nerdcave/taskbarshuffle.htm