Acme Software - Collection of Unix freeware. Some trivial, some massive.

April System Design - Offering commercial software focused on PC-to-UNIX connectivity.

Common UNIX Printing Solution (CUPS) - A portable printing layer for UNIX.

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.

GNU Operating System - Official site of the project to develop a complete Unix-like operating system comprising free software. Includes project history and philosophy, licenses, downloads, and details of how to get involved.

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.

Kbackup - User friendly backup package for UNIX.

Legato - System backup software and data management for network servers.

Less - Pager program for Unix, better than "more".

Unitec Informatik - Unix system spooler for commercial applications, programming tools for client/server development, Java applets and system programming.