Looking for simple searchable DMS

Question

Hello,

We have a project with a looooot of documents (Word,Excel, TXT, Pdf, ...). Currently, we simply store it on a shared folder.

But it has soon become not mangeable.

Do you know any simple open source (and free or cheap, even for commercial use) DMS that would enable to search within all these data ?

I already know about Alfresco and Nuxeo, but they are expensive and with too many features (like document flow for example).

What I need is : * 'Google like' search inside MSOffice documents * Still access via a standard shared folder (Webdav or so) * Transparent versionning (optional) * Tagging (optionnal)

Thanks in advance for your help.