Web Files Viewer: it's easy because it's only one file
Here is the "to do list":
Content revision date: 2009/09/30.
Previous and Next buttons
To show previous and next file in the current directory.
Especially user friendly when browsing a picture gallery.
Display size for all files even directories
Show number of files contained by the folder near its icon.
Enable theme choice
Not only to choose colors but also presentation of files
(as list, detailed lines, ... as file browsers do long time ago).
Use of the $lg var. I've already done that before.
Test real file types
It reads the files extensions for the moment.
Put an icon for other file types than directories and URLs
May be for pictures, sounds, movies, documents, archives,...
(as Apache does).