JFig Java Configuration Management Tool
A Configuration utility that provides simple, flexible and powerful functionality for managing one or more configurations in a java environment. It uses a combination of a hierarchy of configuration files, substitution variables and property variables. [Open source, GPL]
http://jfig.sourceforge.net/

Routing Configuration
Configuration information for 3Com Corebuilder products
http://support.3com.com/infodeli/tools/switches/cb9400/product/12280/c15ip.htm

RFC 3646
DNS Configuration options for Dynamic Host Configuration Protocol for IPv6 (DHCPv6). R. Droms. December 2003.
http://tools.ietf.org/html/rfc3646

KTA Corporation
Reengineering, Consulting, and rehosting services for Software applications
http://ktacorp.com/

RFC 3898
Network Information Service (NIS) Configuration Options for Dynamic Host Configuration Protocol for IPv6 (DHCPv6). V. Kalusivalingam. October 2004.
http://tools.ietf.org/html/rfc3898

Herbeck+Associates
Herbeck+Associates provides information security planning and configuration, risk assessment and audit, ISO 17799/27001/27002 planning and implementation, and technical training and development.
http://herbeck.com/

Pettingers.org
Useful stuff from the good folks at pettingers.org including spam fighting tools, reloading information, skydiving tips and large caliber handguns. You will also find Perl code examples and programs to help you monitor log files, fight spam and fight hackers. We also have a family section for things like photographs and genealogy data.
http://www.pettingers.org/

Chackett Consulting
Architecture review and performance tuning. Sun Solaris server sizing, acquisition, racking, installation. OS configuration, application loading, network configuration. Located in Atlanta.
http://www.chackett.com/

LutelWall (Lutel Firewall)
LutelWall - free linux firewall script
http://firewall.lutel.pl

#hackfix project - software configuration guides
hackfix.org
http://www.hackfix.org/software/configure/