LinShare

Specially designed to secure paperless trading companies that put privacy and
traceability in the heart of their problems of exchange, LinShare provides a
simple solution completely intuitive.

    * Linshare allows employees to upload files into their space
    * Linshare can share files with internal or external collaborators
    * Linshare offers several features to securely exchange

More information on http://www.linshare.org/