BuddyPress.org

The Group Documents plugin could be forked pretty easily to become user documents. I mean, you gotta know PHP, and you’d have to change a bunch of stuff, but the changes would be pretty straightforward.

Alternately, you could probably just extend the plugin as is with a few well-placed action hooks. It already records the user uploading the document. All you would really have to do is change the menu to show up on the user page, and feed it a dummy group id. There may be other hitches, but there’s probably enough shared code to justify consideration.