Software

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

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

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/

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/

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

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

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

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

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