Apache
Apache
http://www.apache.org
Clarkconnect
Clarkconnect
http://www.clarkconnect.org
Openbsd
The main openbsd page
http://www.openbsd.org
Redhat
Red hat is the world's leading open source technology solutions provider with offerings including red hat enterprise linux, open source applications, security and systems management, virtualization, services oriented architecture (soa) solutions, server and desktop operating systems, java application software and services, and the jboss enterprise middleware suite.
http://www.redhat.com