AFS
   Andrew File System
   http://www.cs.cmu.edu/afs/andrew.cmu.edu/usr/shadow/www/afs.html

ARLA
   Arla is a free AFS implementation
   http://www.stacken.kth.se/project/arla/

Andrew Morton: Ext3 for Linux 2.4 Kernel
   Provides links to documentation, patches, downloads, tools, CVS and mailing lists.
   http://www.zip.com.au/~akpm/linux/ext3/

Coda File System
   CMU's advanced networked File System
   http://www.coda.cs.cmu.edu/

CryptFS
   A stackable vnode level encryption File System
   http://www.fsl.cs.sunysb.edu/docs/cryptfs/cryptfs.html

DFS
   Distributed File System
   http://cs.gmu.edu/~menasce/osbook/distfs/

FHS
   Filesystem Hierarchy Standard
   http://www.pathname.com/fhs/

Filesystems HOWTO
   Describes a wide variety of filesystems and instructs you on how to access them from a wide variety of operating systems.
   http://www.penguin.cz/~mhi/fs/

JFS for Linux
   Provides specifications, documentation and downloads for IBM's journaled file system.
   http://jfs.sourceforge.net/

Lustre a network clustering FS.
   An offshoot of AFS, CODA, and Ext2.
   http://www.lustre.org/

SFS
   A networked file system which provides security over untrusted networks.
   http://www.fs.net/

Solid File System (SolFS)
   A single-file virtual file system for Delphi (VCL), .NET, Windows, Linux, PalmOS, PocketPC.
   http://www.solfs.com/

xFS
   Serverless Network File Service
   http://now.cs.berkeley.edu/Xfs/xfs.html