Free software and it works well. As I'm working different articles and my dissertation, it is a great database to organize documents. While I have documents in different spaces on my hard drive still, this can link to them no matter where I have them. I place what files I want in there, I edit the metadata and whenever I'm writing a paper (say on tacit/explicit knowledge) I'll just search my database for the keyword.

I'm sure it has other functions (obviously, as the website shows it is capable of handling audio and video functionality as well), but as a doctoral student who prefers to deal with PDF, doc and html files as opposed to mounds of papers - this is a much more effective way of handling knowledge.

Hopefully this can help someone, or if anyone has found something better, let me know. I'd love something with a better GUI and the possibility of adding the article abstract in the metadata.

Curtis