Intranet File System Distribution: ftp://www.disa.mil/pub/
Information on the SMB system: http://samba.anu.edu.au/cifs/docs/smb-history.html
smbfs Distribution: ftp://ftp.gwdg.de/pub/linux/misc/smbfs/smbfs.tgz
Netscape's Catalog Server: http://home.netscape.com/
All listings referred to in this article are available by anonymous download in the file ftp://ftp.ssc.com/lj/listings/issue50/2600.tgz.