QTTabBar is an add-in that gives a Tab Browsing Feature to Windows Explorer. The page is pretty sparse so there’s not a lot of information directly available. However, the forums on the site show there is a bit of activity going on this project. Essentially, QTTabBar gives you tab features like in your browser. Cool idea, wonder why this isn’t baked right into the OS as it is? I know I hate having a bunch of Windows Explorer windows open!
QTTabBar requires Windows Vista or Windows XP + .Net Framework 2.0 or later ( Tested on 32bit ). You can download QTTabBar, plugins, and themes all from the main site: http://qttabbar.wikidot.com