OpenCalais.com will generate tags for stuff - but maybe not like you want.

Have you looked at KnowledgeTree?  http://www.knowledgetree.org/Main_Page

I think the Gnome Tracker is meant to do the organizing, just without all
that nice comfortable hierarchy.  http://projects.gnome.org/tracker/

On Wed, Sep 22, 2010 at 11:24 AM, Tom Ostlund <tom@ostlundgroup.com> wrote:

>  Hello All,
>
> I want a document manager application to replace Mariner's Paperless
> software for mac. It is the only piece of software that I have not found a
> replacement for.
>
> The program adds meta tags to pdf files for organizing into categories. It
> also constructs the entire chronological directory tree in YYYY MM DD
> format.
>
> www.marinersoftware.com has video tutorials that describe all the features
> of the software.
>
> I would love hear of any alternatives that users are aware of.
>
> Thanks,
>
> Tom
>
>