Web-based file manager

Does anyone know of an existing web application that allows you to store a list of downloads (any type of file) along with a description, and that also has search capabilities It would kind of be along the lines of an FTP server, but it would use a web interface (e.g., it would be an actual web site). I want to use this for my local intranet.

Also, if I made something myself, would it be better to use MySQL or XML?

To answer the second question, MySQL, just for the search features (I can hear the XML zealots screaming about XSLT, but you can shove it... you know SQL is better for searches).

But no, I don't know of a CMS like that specifically, but I haven't tried many. You'd probably be better off making your own.