Dual Top v2.5 by Paul B. Murdaugh (Dated 7/11/1991) is an EXCELLENT replacement for the GEOS DeskTop.  If you've used GEOS for any amount of time, you'll know that the DeskTop interface gets a bit clunky when dealing with many files.  Dual Top to the rescue!  Dual Top forgoes page after page of icons in exchange for a simple but powerful two panel interface for getting at your program and documents.  Please see the documentation included in the archive for further info.