elFinder is a Web-based file manager that was inspired by the simplicity and convenience of Mac OS X's Finder. It attempts to make working with remote files as convenient as working with those on your computer. It supports QuickLook for most types of files, copy/move with drag and drop, hot keys, a built-in text editor, context menus, and much more.
JunkBox is a lightweight Web application that can track your files and record every single click. You can get the total number of hits and statistics on who downloaded your files, and how and when. It is completely transparent, so every link looks like an ordinary link to an ordinary file.