Which is the better Document Management System on PHP-MySQL?

[amskape]

Dear Friends,
I am looking for a document management system (DMS) which have some basic properties like :

1. Accessibility for Blind people

2. Can upload scan documents with lot of tags for later search purpose of document.

I saw 2 DMS namely seedDMS and OpenDocMan(ODM) . But don't have much idea. Suggest is this system done from scratch (without using any lib) is beneficial.

Waiting for a response

Thanks

Anes