xplorer2 also has tabbed browsing and many other features beyond what I saw in many other Explorer replacements. Also, you can configure xplorer2 to work the way you want to work by enabling or disabling features or modes. It can do side by side or top/bottom windows like in Total Commander, or you can just set it up as a single window tabbed browser, or even side by side tabbed browsers. The unfortunate side, like most Explorer replacements, is there is somewhat of a learning curve to gain full advantage of it's features.
Classic Shell should have been included. Classic Shell offers customizable buttons at the top of the Explorer window and even allows making your own buttons and functions. For example, I added a DOS command prompt icon that runs DOS in the folder I am currently viewing in Explorer. Most important to me, it added the UP button next to the BACK and FORWARD buttons that were removed in Windows Vista/7. Classic Shell also offers a customizable Start Menu to bring back the XP like Start menu, or an XP/Win7 hybrid - of course all customizable.