The de facto standard open-source DNS server. BIND ships on most Unix platforms, and is the most widely deployed DNS server. There are four major versions of BIND, each with significantly different designs and architectures: BIND4, BIND8, and BIND9. This page refers to BIND9, a ground-up rewrite of BIND featuring full DNSSEC support.
Microsoft DNS
The DNS server provided with Windows Server, a key component of Microsoft's Active Directory, and therefore one of the most widely deployed implementations of the DNS.
Djbdns
The second most popular open-source DNS server, and the first security-aware DNS server, by Daniel J. Bernstein, author of qmail. Designed as a response to BIND.
SimpleDNS Plus
A popular Windows DNS server for small and medium enterprises.
NSD
A popular open-source authority server provided by NLNet Labs. NSD is a test-bed server for DNSSEC; new DNSSEC protocol features are often prototyped using the NSD code base. NSD hosts several top-level domains.
PowerDNS
An open-source DNS server with a variety of storage backends and load balancing features, notable as the DNS implementation relied on by Wikipedia. ----- tqbf18:22, 2 December 2007 (UTC)[reply]
MaraDNS
A security-aware open-source DNS server by Sam Trenholme.
ANS
An high-end authority server from Nominum, a company founded by Paul Mockapetris, the inventor of the DNS. ANS was designed to meet the needs of top level domain servers.
CNS
A high-performance recursive caching server from Nominum, intended as a secure alternative to BIND for enterprises.
Secure64 DNS
A security-hardened DNS appliance, deployed on a proprietary 64 bit operating system running on Intel Itanium hardware.
Posadis
A full-featured open source DNS server, written in C++, featuring Dynamic DNS update support. Last updated in 2004.
