help identify the taskbar cab please

[disco_y2k]

hello,
a while back i cooked up a configuration using ppckitchen and it had a taskbar at the top like the one in xp sorta. like it showed all the apps you have open and running and you could click on the tab in the task bar to switch between apps. i have been trying to single out which cab exactly sets up the taskbar like that. if anyone knows off hand please let me know.

thanks

cheers
disco