File System

arla
a free implementation of an AFS client
http://www.stacken.kth.se/project/arla/

@Backup.com
Automatic online system backs up and protects your files everyday. Provides easy access to files via the "File Selection Wizard".
http://www.atbackup.com

Mobiliti Inc
software designed to increase the productivity of the remote computer user.
http://www.mobiliti.com

NFS Client/Server by XLink Technology Inc.
Windows NT/98/95 to UNIX connectivity solution. Product include Omni-NFS Enterprise, Omni-NFS Server, Omni-X-Server, Omni-Print lpt/lpr, Omni-VT420 Terminal Emulation.
http://www.xlink.com/

rdist
RDist is a program to maintain identical copies of files over multiple hosts.
http://www.MagniComp.com/rdist/rdist.shtml

rsync
Fast incremental file transfer over its own protocol or other transports (usually used with SSH for secure transfers).
http://rsync.samba.org/

Solstice NFS Client
High-performance NFS file sharing and disk caching.
http://www.sun.com/software/solstice/netclient/nfs-client.html

vVault.com
Offers remote access to shared or private files, one-step digitization of paper files, and wireless printing to any fax machine.
http://www.vvault.com/