Open Source/Free doc library

not sure where to post this but I was wondering if anyone had seen a freeware or open source document library application somewhere on the web?

I though this one would have been perfect

http://iwonderdesigns.com/?q=node/3

But it needs mySql which I don’t have and don’t want just now. (It doesn’t need to have a database in the background. The reason this one fitted the bill was because of it’s list of features).

This is just a quick fix because in 4-6 months we’re getting a big enterprise management tool that we’ve paid big bucks for, however I was wondering if there was something that could maybe fill the gap until it got here.

Any ideas?