AT T Labs Research  
   Software developed by AT&T Research labs. Data management, form processors, libraries. Implementation of Unix on Windows pc.
   http://www.research.att.com/sw/tools/index.html

Common UNIX Printing Solution (CUPS)  
   A portable printing layer for UNIX.
   http://www.cups.org/

comp.sources.unix  
   www interface to the approved submissions to the comp.sources.unix newsgroup since the group started in 1983 as mod.sources.
   http://sources.isc.org/

April System Design  
   Offering commercial software focused on PC-to-UNIX connectivity.
   http://www.april.se/

Legato  
   System backup software and data management for network servers.
   http://www.legato.com

Generic NQS  
   Free Batch Processing For UNIX and compliant OS's
   http://www.shef.ac.uk/uni/projects/nqs/Generic-NQS

1776, Inc.  
   Provides and supports server redundancy solutions for high availability, fault tolerance and disaster recovery with on-line system backup and on-line maintenance for major Unix platforms.
   http://www.1776soft.com

Unitec Informatik  
   Unix system spooler for commercial applications, programming tools for client/server development, Java applets and system programming.
   http://www.unitec.ch/

Acme Software  
   Collection of unix freeware. Some trivial, some massive.
   http://www.acme.com/software/

Kbackup  
   User friendly backup package for UNIX.
   http://kbackup.sourceforge.net/

Less  
   Pager program for Unix, better than "more".
   http://www.greenwoodsoftware.com/less/

GMT - The Generic Mapping Tools  
   A free, open source collection of 60 UNIX tools used to manipulate (x,y) and (x,y,z) data sets and produce Encapsulated PostScript File illustrations ranging from x-y plots through 3-D perspective views.
   http://gmt.soest.hawaii.edu/

GNU Project: Free Software Foundation: FSF  
   Official list of GNU Free software.
   http://www.gnu.org/