ExplorerXP

The standard Windows Explorer has a Tree View for folders and a List View for folder and file listing. Only one folder can be "explored" at a time. FireFox made Tabbed browsing polular, and off late, Internet Explorer has introduced tabbed browsing in Release 7. Windows Explorer still lacks this feature.


There are softwares where more than one folder view is available in verticle or horizontal split.


2xExplorer has been there since long with a scaled down version for non-commercial use:
2xExplorer Site





There is another recent entry with similar feature:
ExplorerXP



Sooner or later, Windows Explorer will have to introduce this feature.