http://www.explorerplusplus.com/

Freeware, one stand-alone portable file.

From the author's web site:
Explorer++ - Version 1.3.4 (12/11/2011)
Written by David Erceg
Wednesday, 30 April 2008 20:35

Explorer++ is a free multi-tab file manager for Windows.

Available on Windows XP and above, it features the same familiar interface as Windows Explorer, while introducing several enhancements and improvements for a much richer file browsing experience.

Features:

With the option to save to the registry or a configuration file, Explorer++ is completely portable.
Tabbed browsing for easy management of multiple folders.
Display window shows previews of files as they are selected.
Easy-to-remember keyboard shortcuts for quick navigation.
Customizable user interface.
Full drag-and-drop support with other applications, including Windows Explorer.
Advanced file operations such as merging and splitting supported.

Last Updated on Saturday, 12 November 2011 14:08

Fortunately its already in the database: http://www.portablefreeware.com/?id=1482

The "++" bit sometimes doesn't show up correctly in search.

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