Most standard browsers have an option for tabbed browsing including the Firefox, IE 7, Opera, Avant etc. Tabbed browsing allows you to work with multiple windows in the same instance thus saving a cluttered environment and also allowing you to manage the windows efficiently.
What about tabbed browsing for your Windows Explorer? If you are one who opens more than a couple of windows to work with files from different folders then QTTabBar is the right software for you.
QT TabBar allows you to operate files and folders like tab browser folder grouping, histories, and etc, aka it runs similarly how Firefox allows you to move between different tabs.
Minimum requirements are that you either have a Windows XP or Vista Operating system with Microsoft .Net framework 2 installed.
Check out Cybernet's detailed review – QTTabBar Adds Tabs to Explorer in Vista and XP .