Workona - A better way to work in the browser.
groupy - Groupy enables you to drag and drop application windows together to group them together under a common tabbed interface.
Session Buddy - Manage Your Browser Sessions
QTTabBar - QTTabBar is an extension for Windows Explorer that brings tabbed browsing to Microsoft's file...
Toby - Better Than Bookmarks
BrightExplorer - Add a tabbed interface to Windows Explorer.