Quifilt

Quifilt (QUIck FILe Tool) is a single or dual pane file manager that is designed to replace Microsoft's Windows Explorer.

The program uses a sub-set of the file management portion of Filedoyen and thus benefits from some of the same features that will be found in that program.
Along with its single or dual file manager modes, Quifilt can also be used as a picture viewer to display images of many differing formats and has a useful integrated search tool.