Chami.com: WhoIsNot - Finds reserved, on-hold and available variations of domain names. Detailed list of features, free trial version, FAQ. [Windows].
Cisco: Network Registrar - A scalable DNS server. Free trial version, FAQ, technical documentation. [Windows].
Djbdns - Domain Name System tools, links, and tips. [Unix].
DNS Boss - Management software for Solaris, NT, Linux. Free trial version, documentation and instruction..
Internet Software Consortium - Non-profit corporation dedicated to developing and maintaining production quality open source reference implementations of core Internet protocols. BIND is available here for free..
ISC's BIND - The developer's site for the Berkeley Internet Name Daemon at the Internet Software Consortium..
Linux NIS(YP) Server and Tools - The Network Information Service (NIS) provides a simple network lookup service consisting of databases and processes. It was formerly known as Sun Yellow Pages (YP)..
The Manual Page: DHCP-DNS - Free Perl package that allows dynamic DNS update using your DHCP server. GPL license. News, and a glossary of relevant technical terms..
MaraDNS - A public-domain, open source Domain Name Server which offers both authoritative and caching features. Its main goals are security and simplicity..
Men & Mice - QuickDNS and DNS Expert tools. Free trial versions, support page including DNS glossary, FAQ, mailing list. [MacOS, Windows].
MetaInfo - DNS and DHCP server software for MS Windows, Linux, and Solaris..
MyDNS - A free DNS server for Unix that serves records directly from a MySQL database..